Solving Quadratics with Inverse Operation

MR. BIGSBY'S MATH WORLD

Solving Quadratics with Inverse Operation

2/29/2016

33 Comments

solving with square roots on youtube channel

Khan Academy Help

33 Comments

Logan

2/29/2016 06:31:37 pm

Was this the one to watch for extra credit or was it the one before

Mr. Bigsby

3/1/2016 01:51:28 pm

The Unit 2A Test review was for extra credit.

Karli

2/29/2016 07:54:05 pm

Piper

3/1/2016 12:15:57 pm

You forgot to label the triangles with A B and C.

Mr. Bigsby

3/1/2016 01:50:59 pm

Nice try. That is a good strategy to prevent mistakes when solving but that is not the mistake I made :)

Allyson

3/1/2016 12:44:08 pm

Thanks

Erica

3/1/2016 12:46:49 pm

On all Tuesdays and Thursdays you will be known as Mr.Dragonberry.

Viola

3/1/2016 02:40:56 pm

FROM NOW ON I'M TYPING IN ALL CAPS

Emily Ritzes

3/1/2016 02:44:50 pm

YOU FORGOT THAT IT COULD BE POSITIVE OR NEGATIVE FOR THE ANSWER!!!! (example: x=+or- 4, the square root of 16 could be positive or negative 4)

Mr. Bigsby

3/1/2016 06:32:39 pm

Winner!

Emily Ritzes

3/1/2016 02:45:46 pm

I think...

Rose Warner

3/1/2016 04:46:16 pm

Hi thabks that cleared it up
Only can you solve a problem with onenumber and 2 unknown

Mr. Bigsby

3/8/2016 04:45:38 am

No, you need at least two of the side values to find the third.

Lauren

3/1/2016 05:17:09 pm

I understand the math and everything but I'm just having trouble trying to find a, b, and c for some reason

Mr. Bigsby

3/1/2016 06:32:01 pm

If you can find the right angle, the "c" is across from it.

Hazel

3/1/2016 05:59:34 pm

Comment- I think the mistake was that you forgot positive or negative for the first two.

Question- Is there a formula/theorem for solving for the longest side of any other shape...like a trapezoid?

Mr. Bigsby

3/1/2016 06:35:35 pm

Geometry has lots of formulas! We are only touching on triangles because of the square root. We will be back to parabolas Thursday.

Alexis Kahler

3/1/2016 06:12:33 pm

I might have eaten some hater-tots for dinner but I got kinda bored with this video because its what we learned in class. If you want to peruse your YouTubing career, then you need to step up your game. Your mistake is that you said, " I'm Mr. Bigsby and I approve this message" you name is Mr. Dragonberry!!!!!

Mr. Bigsby

3/1/2016 06:39:38 pm

Yea, the videos have been kind of like a class lesson at home for students who forget. What would you like to see more of? More word problem examples? Maybe some unanswered problems? More videos before the lesson? I am open to suggestions.

Julianna

3/1/2016 06:37:08 pm

Nice Video!

Jaelyn

3/1/2016 07:29:53 pm

Does it matter what angle is A or B if u Already know what C is ??

Mr. Bigsby

3/8/2016 04:44:57 am

A and B are the side lengths, not the angles. And it does not matter which one you label A or B. But the hypotenuse has to be C.

Georgia

3/2/2016 04:48:54 am

AMna

3/2/2016 07:37:44 am

hey

Ethan Anderson

3/3/2016 04:39:11 am

Good video

Sarina

3/3/2016 07:03:31 pm

Ok thanks

Zoe

3/8/2016 08:08:52 pm

Good video

Krissy

3/9/2016 01:57:34 pm

fletcher

3/10/2016 05:48:07 pm

thx mr bigsby for putting these very helpful videos for us to watch!

maddox

3/16/2016 12:12:30 pm

Amna

3/27/2016 08:19:51 am

I needed extra credit so I had too ask a question
will there ever be an equation when u have too find all A B and C?

Sarina

3/30/2016 10:24:58 am

Kendle

4/7/2016 07:57:43 pm

NEVER FORGET THE + & -