Identifying Quadratic Functions

[@idkhow]

i learned more in 6 minutes than i did in an hour

[@leaves6762]

I sat in a class for 2 hours to learn this and then this man can teach me this stuff in 6 minutes

[@nathanb6125]

This video was helpful, thank you. Learning from textbooks and workbooks is difficult in mathematics, your videos have helped me.

[@100ify1]

Thanks my I never know what my algebra teacher talks about

[@stef_459]

I understand this hundred times than my teacher. Thank you so much.

[@panzi4638]

Bro I was watching this video so late that when you start getting sleepy I started too Thank you for this tutorial

[@KairuKobayashi]

Now I know what my algebra teacher has been saying last Friday.

[@mridontknow4412]

well how are u doing now

[@Kaennz]

Yeah

[@jadedeasis7678]

OMg, can't believe I'm not the only one struggling, everyone is having trouble understanding their teachers while this guy can just snap the topic in our heads! Thank u so much it was so helpful, I feel much better know in taking my exam tom.

[@jadedeasis7678]

omg you replied instantly!, HII

[@sheryldizon8280]

every people yawn at mathematics

[@rozy.b5199]

why wont they

[@thiiird8199]

Ye he even yawned 4:40

[@hellohowareyew]

Thank you so much! I was panicking because my teacher assigned us to do an assignment related to this and I didn’t learn anything on her discussion. This helped

[@elizarose3499]

I only need one mins in this vidoe cause i understand it very well thank you sir

[@Gsneakers1]

Thank you for making an actually helpful math video

[@mamaruth8457]

It helps me a lot. Thank you 😊

[@angelicabonifacio7590]

Hey! Thank you so muchhh! You're the besttt! I've watched many videos with the same topic but this one is farthest most understandable. Thank you so muchhh! Iloveyouuu! Moreee videos to makeee!

[@angelreid4625]

Super Helpful! Thanks!👍

[@mymum2375]

You helped me out man thanks 🙏 💪🏽

[@AreosOriginal]

I am no longer anxious to take my exam tomorrow thanks to you

[@katdfinns]

Thank you. It was helpful

[@Dxxsirre]

May I ask on how you made a table out of the equation? My assignment doesn't have a table provided before hand, thank you in advance.

[@pauleencastro117]

the what if the purple ones are decreasing? is it not quad? cause mine went like this +1, +2, +3, then +2 again.

[@ziadgaber9184]

THANKS soo much i droped a like by the way👍😘

[@prinxipie1037]

lol this dude is still hearting comments on a almost 9 yr old vid

[@MartyBrandl]

Math never gets old!! 😂😁

[@gaxb7078]

@@MartyBrandl lol yeah

[@nathanvaltierra8707]

What if in the equation, it has a number to the power of x

[@MartyBrandl]

That would be called an exponential equation. In order to be quadratic the largest exponent has to be 2. 👍

[@nathanvaltierra8707]

Thanks for the clarification

[@Ace-mu8fp]

thank you . you can sleep now

[@jesusismyking4743]

Heyyyyyy 😂😂😂

[@hirakoshinji5747]

I have a question what if x isn't also equal? Do we also need to find the difference of it?

[@mikko6841]

Plsss help me plssss What if there's an x Like this : x 2 Is that an quadratic function????

[@mikko6841]

I really hope he answers

[@MartyBrandl]

No, x^2 is a quadratic. 2^x would be an exponential function. You could try graphing y = x^2 and y = 2^x on Desmos.com to compare them. I hope that helps! Keep working hard and asking great questions! 👍

[@daisyperico4475]

i was frustrated earlier but not anymoreeee, thanks

[@frosting_flakes]

You’re a legend

[@andrewmascarinas9908]

what if the differences are -1, -3, +1, +3 would it be quadratic also?

[@MartyBrandl]

Remember, the second differences need to be constant. So in your example, no. Thanks for asking! 👍

[@tameemabdelmoniem4864]

i want u to tell me how to know the answer plz Tell whether the graph of each quadratic function opens upward or downward . y = -3x2 + 5 opens upward opens downward i didnt know whats opens upward and downward mean so can u help me :)

[@MartyBrandl]

For quadratic equations the graph is always a parabola (U) shape. We can tell if it opens up or down by checking the sign of the coefficient of the x^2 term. In your problem, the coefficient is -3. That means the graph opens down (more like an n shape). If the coefficient is positive, the graph opens up. If it's negative, like your problem, it opens down. I hope that helps! Keep working hard! You can do it! 👍

[@tameemabdelmoniem4864]

@@MartyBrandl thank you that helped a lot .

[@lailaniemendoza3762]

OH MY GOD THANK YOU!

[@MrJC-ob2hk]

wassup this is me watching this vid last minute before my exam

[@MartyBrandl]

Good luck! 👍

[@Ame-jt2yf]

Why did you stop teaching? It almost 7 months since your last video, hope you're okay. You're a great teacher

[@MartyBrandl]

I'm doing well, just keeping busy with my current students. Thank you for the feedback! I'm hoping to add more videos during 2021. :-)

[@jayfaith316]

Thank god I understand it. But, are sleepy?? 😊😅

[@ZAKUZUD]

thanks so much!

[@WilfredBarcela]

Yep haha *Yawn but thanks

[@danishshafayi9469]

helpful tnx

[@elyssalomibao2698]

What if the y-values have negative sign 🥺 em I still gonna do that 🥺

[@MartyBrandl]

Absolutely! It works the same way. You could also graph the ordered pairs to get an idea if it has the parabola shape. 👍 You got this!

[@rachelleadil922]

Thank youu

[@jonicaloueugenio5794]

f(x)=2x(squared) -x+1 is it quadratic?

[@habibahossam9293]

yes it is because y=ax squared+bx+c

[@christianoglow8497]

yes

[@condoriano6361]

Thank you so much sir

[@maauroravocal4824]

Thank you

[@Kaennz]

This help thanks

[@maliklyttle]

thanks teach

[@El23222]

wtf is this all green

[@johndaleprado9785]

Who is watching here in 2021

[@Bruh.Andrew]

Friday 11:50 pm I don't think im gonna make it I got 10 lessons and this is the first

[@MartyBrandl]

I hope you made it! Either way...live and learn! 👍

[@maspangitka2431]

thanks ;)

[@annkatrinareal8476]

Get some sleep

[@tripped_and_fell_into_his_bed]

My friend said that you can determine a quadratic equation in a split second if the equation happens to have a squared exponent. Is that true?

[@MartyBrandl]

Yes, if you have an equation and the highest exponent is 2, that's true. 👍

[@tripped_and_fell_into_his_bed]

@@MartyBrandl Thank you!