10 = -10 Of Course Not!

This a perfect example of how misunderstanding critical mathematical rules can get you the wrong answer.

[@deadmanswife3625]

Well you can turn a negative 10 into a positive 10 if you're talking about the absolute value of 10😂

[@sarahsheehan6184]

This is what I thought.

[@pallavijoshi6822]

I agree with that idea. It's super easy that way😂😂😂😂!!!

[@jimjenke3661]

In high school I had a book to learn math and nothing else, not even a slide rule. Mr H would have helped me a lot. The present generation needs to be grateful for having computers, the internet, and Mr. H

[@sparkyheberling6115]

0:05 I predict…there will be a step including division by zero. ::::: 1:44

[@zeynep-kl7hq]

Thank you Mr. H.tutoring

[@StaticMotions]

God speed to the Truthsayers. Keep holding the line on what is right. Liked and commented

[@sayaksen7545]

What the fuck are you talking about

[@leofun01]

02:10 -- well.. it depend from the definition of sqrt, what it returns. By some sqrt definitions the mistake will be in A.

[@alvinchow-beta8374]

C Because The condition of the identity √(ab) = √a • √b is a > 0 or b > 0, that means at least one for the parameters a and b must be a positive number, simply put it is both parameters cannot be negative at the same time.

[@pjgonzalez40]

I was going to say A. Because a square root of a perfect square can have to possible out comes either 10 or negative ten. The i analysis was good when one take into account the existence of complex numbers. However, because there is a plus minus in front of square root the negative solution has to be discarded because negative 10 is not equal to 10. In the end the starting premise of the problem is wrong because 10 is not equal to negative 10 so why even bother to prove it. What you did prove though with the imaginary unit is the existence of a negative square root -10 for the square root of 100.

[@AlakhShankar]

Yes it is true only if you are finding the value of a variable so in this case the value of root 100 is only positive 10

[@SubhajitMaji-jk5ee]

👍👍👍

[@edbreedon9456]

Nice one

[@gregnixon1296]

Between steps A and B. Sqrt 100 = 10. Principal root. By all that you did, you dragged -10 along for the ride.

[@jasonrubik]

C only because it "felt wrong". Gut instinct

[@TheMathManProfundities]

Gut instinct is correct.

[@alex_ramjiawan]

Point C.

[@Levas-29]

Nice

[@architkumarjha]

Point C is has an error

[@TheMathManProfundities]

There are only certain circumstances where we can say √(xy)=(√x)(√y). For real numbers we need either x or y to be ≥0. Otherwise √(xy)=-(√x)(√y).

[@LITHICKROSHANMS-gw2lx]

Sir but √((a)(b))=√(a).√(b) If a

[@surfer_guy942]

Step C is wrong. sqrt(a * b) = sqrt(a) * sqrt (b) only if a and b are non-negative. A better question is why?

[@Kmathaddict]

I think this work only if we are talking about the absolute value of x

[@nnnnick]

C

[@chouchfroukh]

Genius

[@chienbin4813]

that looks quite easy but i assume this will help many people

[@gatewaytoperil9569]

So I do have 10 thousand dollars in my bank account, I don’t know what “debt” they were talking about.

[@coccodrillob-hb9gu]

The correct is C) , because (ab)^½=(a^½)(b^½) just if a>0 and b>0

[@whoff59]

still allowed, if only one of a or b

[@TheMathManProfundities]

(ab)^½=(a^½)(b^½) always it's only when we're dealing with principal roots that this issue arises.

[@Kmathaddict]

I think there is and error at level of c cause when we have multiplication of negative numbers in a square root we first compute the 2 negative numbers

[@sarahsheehan6184]

In my head, put negative 1 times 10 equals -10. -1 X 10= -10. That’s simple. Mr. H, am I right?

[@Rorablink]

Nice vid

[@Brid727]

A is true fine, B is also true C IS where the mistake is. You can't distribute the square root among two terms if both the terms are negative.

[@ToanPham-wr7xe]

😮

[@Photon_Shadow]

The answer is actually A & B, not C. You set 10 equal to √100 but that's wrong because the √100 doesn't equal -10 which is the number you were supposed to be substituting for. *So basically, as soon as he made the -100 a square root it was over, cuz he would just have to do what's in the parentheses which takes him back to -100

[@joinfortherapy6470]

I feel like i seen this before and its about putting an absolute for the square root

[@shreeharishanmugam1483]

[(-25)(-4)]^1/2 is not equal to [(-25)^1/2][(-4)^1/2] Peice of cake

[@fubaralakbar6800]

Now how did I know there were going to be negatives and square roots together here?

[@Karlsefni-tu4zf]

Terrance Howard may say otherwise if we ask him

[@AK58008]

is it B?

[@n_ow2808]

thank u sir....(first). INDIAN 🇮🇳🇮🇳🇮🇳🇮🇳🇮🇳🇮🇳👇👇👇👇👇👇👇👇👇👇👇👇

[@blackgross6372]

Yeah stupid people like this foolishness he's begging you

[@BloxxterT]

Dude leave politics out of mathematics

[@blackgross6372]

@@BloxxterT 😂😂 come on man he's Indian... they'd die if they don't get likes

[@pushpavalliravichandran5593]

A

[@edewf8478]

C is the mistake

[@Kmathaddict]

Can that work 😅😅😅😅

[@GHOST94113]

Im watching whiles im in year 9 not knowing a thing

[@hiyeena3365]

E

[@bhuvneshsoni7695]

f

[@dr.strange1447]

B

[@kengomillia]

D

[@swap7202]

Why (-) × (-) = +

[@wiewiur8858]

5th grade math rules

[@illuminatiagent7691]

Because thousands of years ago, someone decided so.🤔🤣

[@EricA.Ephemetherson]

I've stopped the video and the error is at point C.

[@shannonmcdonald7584]

You forgot the factorial lol

[@tejpalsingh366]

Their must be some fault ... Otherwise whole maths will doom .. Shudcavoid these kinds of trivia

[@illuminatiagent7691]

I know I'm being super dumb here going against Mr. H, but I thought "F-G" was the mistake. Doesn't any number (i^2 in this case) to the power of 2 become positive? I'd appreciate it if someone could explain that to me. Thank you.

[@whoff59]

It's the definition of i that i² is equal to -1.

[@bigscrounger]

100^1/2 is also +/-10, not just +10. As we are not only counting the radical

[@madarab]

No

[@Brid727]

then could you explain the reason behind why the +/- is in the quadratic formula? you could have either plus or a minus, why both if the square root radical is gonna output both plus and minus anyways? that analogy you suggested could lead to two different solutions to the same operation which in arithmetic CANNOT happen.

[@madarab]

@@Brid727 It is not the same operation. ^2 and ^1/2 are not the same. One is square, the other is square root, inversed function. ^1/3 is cube root, ^1/4 is 4th root, ^1/5 is the 5th root etc.

[@bigscrounger]

@@madarab exactly 💯

[@Brid727]

@@madarab that didn't answer my question as to why the +/- exists in the quadratic formula. I KNOW that x^2 and sqrt(x) are clearly different and the inverse of each other 😒

[@cinegasro7180]

C

[@_Utechpro_]

B

[@wernergamper6200]

C

[@soldier4242]

C

[@compton8301]

C

[@rajithaprakash9243]

C