Exponent rules part 2 | Exponents, radicals, and scientific notation | Pre-Algebra | Khan Academy

2 more exponent rules with an introduction to composite problems
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[@coolshiz7319]

I swear I get more info in 7 minutes here than I do in an entire hour and a half math class by the daily.

[@gotchathrills8916]

Combat Dreams same

[@jaycechavarria807]

Right

[@kiaralopez7479]

I'm having to relearn all of my high school math for the GRE after three years of no math and these Khan Academy videos are the bomb.

[@TaimTeravel]

Exactly what I'm doing right now. Forgot math for not doing it for 2 yaers. Now I have to relearn them. I'll start my Mechanical class after a week so these videos are really helpful.

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Wow technology has upgraded a lot

[@beaniemask]

Ikr

[@ibnabdelhye]

جراك الله خيرا واعزك الله واحبك الله وهداك الى صراطه واعطاك ذرية صالحة

[@adam700r]

I believe we are all wrong, (except the professor)we are suppose to distribute the exponent into each base in the parentheses, third power of 2 is 8, of 7 is 343, so simplified it would be 8 times 343 equals 2744. I think i made the mistake of not understanding the distributive property, thank you sal for the vids, you are making the world a better place.

[@OkayCompuuter]

I wish you were my math teacher!

[@ayasavid9807]

How is life 9 years later ? Did it help you? Do u remember the days u were studying this ?

[@cocorose2958]

@@ayasavid9807 oop-

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@@ayasavid9807 😎

[@ecto98]

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I'm thanking God that Khan Academy exists!

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yes he really is a very generous person. If you watch the video of his TED talk, he says it all started with just making videos for his nephews(?) to help tutor them with math, but it grew from there :) Most of my school years were in the 1980s, well before the vast Internet we have today, and certainly long before KZbin. But I only just discovered Kahn this year and he's been helpful both in my math and art history courses that I've been taking towards a degree in Graphic design.

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I can see how you feel there, my Dad's school years were in the 1990s, he luckily had access to a computer, but those were probably limited back then.

[@Realisticz16]

Thank you! When that last equation came up i paused the video and worked it out. Based on what you showed before, i used a different method and came up with the same answer. I despise math generally so that was great, normally i'd have to do it the long way.

[@jus1taj]

Right on man, had a frustrating time with this chapter. Much better now. Thanks. I'm trying not to hate math anymore. He he. This helps.

[@esmerelda1743]

How's life 7 years later?

[@iamaboc]

These videos really make you realize how teachers need to teach

[@venomlovekitties]

Most underrated comment!

[@alstrup69]

AWESOME!! I wish I found this years ago... THANKS FOR CREATING THESE VIDEOS!!!

[@TaimTeravel]

Hey there? How're you? Hope you're not dead :(

[@Thew26XppX]

this is so handy. help me get my SAT scores up! thank you

[@ShineyMew7]

You are soooooo helpful! Thank you so much!

[@letterman151]

I can thank getting a 90 in math to this guy.

[@edwardliao3973]

This is pretty easy.

[@ivanmiguel5948]

finally i can pass my math test. thanks

[@anacedeno3562]

Such a soothing voice!

[@esmerelda1743]

Ikr!!!

[@noorabuelsoud4504]

i always use khan academy for my studies honestly so useful!

[@RayKasprowiczJr]

Thank you! Another excellent video on exponents.

[@ayasavid9807]

How is life 9 years later ? Did it help you? Do u remember the days u were studying this ?

[@RayKasprowiczJr]

@@MN-bj4ys yes, it helped tremendously. Although I haven't needed it since graduating.

[@TheWilly879]

Thank you! You helped out so much! ✨

[@amitpareek187]

thanks SAL. i was really confused. but then you cleared my doutbts just in 7 minutes and 43 sec

[@kathrynwood2526]

thank you so much ive been struugling in this till you helped

[@ManiekGra]

The whole khanacademy thing is just too beautiful to be true. We are all about to wake up from this dream. Thank you very much for your work!

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u took time of urs to create this beautiful lesson and the very least i can do is take a sec to say THANKS!

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God bless you my friend, I know there is a special place in heaven for you, and people like you.

[@ayasavid9807]

How is life 9 years later ? Did it help you? Do u remember the days u were studying this ?

[@duck-cc4qu]

@@ayasavid9807 what if he lost his youtube account/made a new one and didnt see this oof

[@sniksder21]

This makes learning fun because I can

[@ayasavid9807]

How is life 8 years later ? Did it help you? Do u remember the days u were studying this ?

[@dougd120]

Important to learn the rules of exponents to succeed in my math major!

[@redactedzero2622]

This is so helpful If you could slow down a little and add some examples for us to try, that would be great!!

[@abbydeleon9334]

So helpful, missed class one day and missed all of this and my instructor was NO HELP about it 😒

[@leannnafirestonelover6125]

I hate when people do that

[@chloebutler8438]

Lol his voice is so soothing if literally any other person had explained this I would probably had punched something because this math is so hard XD

[@madeshsan]

You are amazing 👏🏼

[@orrelljonas3624]

that really helped me

[@kingkukujiao]

200,000 people gave up on video 1 lol.

[@VeraExora]

And 3 years later it's 600k

[@stavshmueli6932]

Project_Nova and a month later almost 700k, just goes to show how rapidly the use of the internet is expanding these days.

[@АбдулалиАбдулалиев]

And year later it’s only 764K view

[@scraper1000]

Really helpful. But in school we are learning problems a bit more advanced like: x^-3 y^3 . 3x^0 and m^2 n^-3 / 2nm^3 So maybe if you could make a video on those, than that would be great.

[@ayasavid9807]

How is life 10 years later ? Did it help you? Do u remember the days u were studying this ?

[@scraper1000]

@@ayasavid9807 10 years..... wow. Hahaha

[@nocturnalvisionmusic]

@@scraper1000 now 12 years ago :D

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I’m still alive

[@nocturnalvisionmusic]

@@scraper1000 awesome :) hope everything's going good for you scraper :) Not everyday someone comes back to comment on their post from 12 years before. Good to see you're still active :)

[@arisdetu2058]

that helped with my homework got top marks

[@Fiorucci79]

Thank you so much for this lesson! It's amazing to be able to find this here. I really appreciate this video and cannot thank you enough, take care.

[@zayan1232]

The fact that you were helped by khan academy 14 years ago and you are probably old enough to be married and have children by now while khan academy it still helping others such as myself.

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@@zayan1232 he may not even be alive that’s crazy to think but the odds are around 15% that he is

[@themightybuegeler4692]

Thank you man you are helping me study for the asvab because I forgot most of my math when I was in highschool

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really helpfull. missed math class... came to him ...

[@overrated_tacos.567]

His voice is very soothing

[@paingoret6]

"When you haven't done it for a couple years" Yep, my problem with a lot of math right now. Brushing up on all of it because it's been too long and I need to know it all for a test.

[@DaleL]

Very helpful and nicely explained.

[@aprilcherry3542]

Thx this really helped but I still don’t understand why they teach us this, it’s a pain lol

[@esmerelda1743]

?

[@yb7689]

For the composite question, Couldn't we just work with the 3squared first? 3sqaured is the same as 9 to the 1st power. So we can just add the exponents 1 and 8 then multiply it by -2 right? I calculated it and 9 to the -18 and 3 to the -36 equals the same thing. So does that mean both methods are acceptable?

[@pipoyhates4163]

thankyouuusoomuchhh this really helps me alot😩

[@lavernmarshall8457]

Loved this lesson

[@RebornAc3]

God bless you Sal!!!!!!!!!

[@ayasavid9807]

How is life 9 years later ? Did it help you? Do u remember the days u were studying this ?

[@bitsofplastic]

thank you!!!

[@umeshchandar6001]

Very useful for revising maths

[@JRxxAKAxxNOZY]

i would love to go to a school with teachers like this guy T_T

[@duck-cc4qu]

my teacher wouldve taken 2 classes to explain what you explained in 7 minutes

[@MrTanya05]

Thank you! So easy to understand when you explain! P.S. Love your voice! ))

[@sad_nuggie4960]

not easy

[@GlamourHeart]

this is really great because im in 5th grade and I have the math MAP test today. I have a score of a 244.

[@jaredmorrow3107]

Fell asleep during the from his voice also because it was already 11:00 where I am but ur voice is the thing that put me to sleep haha wow...good morning

[@queensaharaice7376]

...

[@Lonezewolf]

i have to agree....

[@minaa8960]

WHAT IF THE coefficient is different? pls anser

[@-MissSiri-]

Why is he going to answer 15 years later? 😂

[@minaa8960]

@@-MissSiri- because i know someone else who sees this comment might help me..?

[@syedtariq8957]

OMG thank you so much... But Can you do a bit difficult questions

[@falcoboy3221]

@kerolification in terms of funding i think khan is fine as he receives funding from various sources already. YOU however can repay him by acing your classes

[@aimasood]

GREAT JOB ,

[@lilauz]

thanks a lot Mr. Khan!

[@gulfidoy]

adam ya geldi adam

[@johnfalcon3614]

You can rewrite it as 1/3^36, and that will make it positive. I have a question: Can't you just rewrite the last one as 27^-20, instead of 3^-36; are they not the same?

[@kibur914]

my dad showed me this site and i dont like it but it gave me an excuse to be on youtube when i am not supposed to so tanks sal

[@adam700r]

2 times 7 is in parentheses, it seems that the answer should have been 14 to the 3rd power if you were to solve the parentheses first and the exponents second.I may be wrong because im new to this. But if you have a explanation for my confusion it would be greatly appreciated.

[@winternight22]

This helped me too! thanks Khan!

[@ayasavid9807]

How is life 8 years later ? Did it help you? Do u remember the days u were studying this ?

[@Rauleezy22]

dislikes are the teachers who can't live up lol

[@jinatjahan7937]

What about (4) to the power of 2

[@gotchathrills8916]

That would be 4 times itself(4x4)that would also be 4 squared

[@logicftw92]

I just skipped my math class and went here instead.

[@harshjain6269]

Did you get good grades that year 😎

[@trashderp3585]

@@harshjain6269 man

[@hellomyfriend4427]

Wow excellent....

[@KhanhNguyen-nh5vh]

Thanks

[@lordsxman]

great video thanks for your contribution

[@Python4cbsetutorial]

Thanks SAL, Very clear explanation!

[@iqperson231]

amazing session

[@lucaswilliams7280]

Where are these questions mentioned at the end of the video?

[@abhijitcomplete]

agree with Sal on not remembering the rules directly and practicing them to the point that you remember them naturally.. Sometimes, I forget the multiplication rule while one exponent is raised to another, not because i don't know it, but because I have blindly crammed up the rules instead of focusing on the reason for the rules..

[@yourname9840]

danks w3 r lernin dis n me 3rd gwade claze helpsd alotts

[@yourname9840]

Phillip Lee Lol LMAO it was a joke xD

[@queensaharaice7376]

Lol😍😆😄😊

[@Whyyy-tg8oe]

4:00 note stamp

[@metaldave08096]

6 to the third power times 2

[@malaquiageteo2089]

KHAAAAAAAAAAANNN!!

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WWWWWHHHHHAAAAATTT??😕😕😐😐😆😄😊✌

[@nocturnalvisionmusic]

@@queensaharaice7376 😁😆😙😉🙂

[@Mccormick2023]

this is way better than my crappy math teacher never helping me

[@jasonlouis9140]

keep it up Mr. Khan

[@MrFaran233]

what do i do if both the indices are negative eg: 10^-4/10^-2

[@eyecharm2016]

When u times it by itself though wouldn't it b for ex. 3^2x3^2 wouldn't it equal 9^4

[@naturallypedro]

10^-6

[@bananamana2147]

even with this I still HATE math

[@fatimaakbar8320]

I can't agree more!

[@theFrazierfromFrazier]

this helped so much thank you. also bro this came out before i was born 💀

[@aaronvillagomez1413]

could have been better if you also did the operation to the bases

[@stepheneddieoken4805]

i thought that if you had a negative exponent(lets say -2, it would become 1/a^2???

[@ce_kaitlyn5138]

Thank you!!!!!!!!!!

[@kunai.rebooting2335]

Peridoottt!!! XD

[@babbbyygirll6459]

U were doing good until 6:15 and i was confused from there

[@francisgreene5141]

because you forgot you are multiplyng it not adding it :) i feel you bro xd

[@vasquezg86]

I thought when you have (2 x 9)^100, you multilply 2 and 9 because they are in PARENTHESES and then solve it by it's exponent. (P.E.M.D.A.S.) So my question is why did you instead do the exponent to each one first 2^100 x 9^100 then just left like that?????

[@ayasavid9807]

How is life 9 years later ? Did it help you? Do u remember the days u were studying this ?

[@monstaplexanimates1747]

Bro I wasn’t even born when this came out

[@hi-uq3yr]

SAME :)

[@Garwinium]

i like ya cut g

[@solreacts1998]

how would i solve (-5)(-5)^4?

[@ilikefones]

what if the problem is 3^2 * (3^2 * 2^4)^-1

[@sad_nuggie4960]

i'm home schooled too # ihateschool

[@sniksder21]

Get ahead of my class and ace all test

[@beaniemask]

Fr

[@lollylee69]

Please HELP:Can't you on the last problem-- ((3^2)*(9^8))^-2 make it ((9)^1)*(9)^8)^-2 THEN (9^7)^-2 THEN 9^-14 Wouldn't this be the same thing?? Hope you get what I'm asking...

[@lacedcheerios1843]

2018?