Question

I need help with polynomials!!!
I have watched multiple videos and read my math book, but I still don't get it.
Here is the problem I need help with. y^2 represents an exponent
3x^2 + 6 -2x + 5x - 4x^2 + 9

Answer 1

3x^2 and -4x^2 are like terms

so you just add the coefficients to get 3 + (-4) = -1

this means

3x^2 + (-4x^2) = -1x^2 = -x^2

Answer 2

you do the same for the other like terms

Answer 3

giving out the answer is against the code of conduct and it doesn't help anyway

Answer 4

you add together the like terms so:
3x^2-4x^2= -1x^2
-2x+5x=3x
6+9=15

Answer 5

I don't want the answer I just need to know how to do it

Answer 6

sorry jim_thompson5910 I was going to explain how I got my answer too

Answer 7

alright, do it in the opposite order next time

Answer 8

I just hit the wrong button.. sorry =(

Answer 9

thats ok

Answer 10

So would it be7x^2 + 15 +7x

Answer 11

it would be 7x^2 IF the 4x^2 was positive

but it's not

Answer 12

same for the x terms

2x is not positive, so it's NOT 7x

Answer 13

the negative sign goes with the number directly behind it so:
2x-5+7x+8
2x+7x=9x
-5+8=3

Answer 14

look back up at my first post to see how to combine the x^2 terms

Answer 15

So -1^2?

Answer 16

-1x^2 yes or just -x^2

Answer 17

Ok. Thank you guys so much! I think I understand it now.

Answer 18

yw

Answer 19

glad to help