Question

(4x^2+4x-2)+ (-9x^2+ 7)

Answer 1

ok so the first step is to add like terms

Answer 2

Well, you can take away the parentheses first

Answer 3

how would I do that @kc_kennylau

Answer 4

Just try to write it without the parentheses

Answer 5

And be careful that (a-b)-(c-d) = a-b-c+d (this case doesn't apply here)

Answer 6

the problem states that it is addition

Answer 7

The first step would be like this:
(4x^2+4x-2)+ (-9x^2+ 7)
=4x^2+4x-2-9x^2+7

Answer 8

Do you understand this

Answer 9

combining like terms

Answer 10

this step is not combining like terms though, but it is the next step

Answer 11

so I take-1 from the second parentheses?

Answer 12

Nah

Answer 13

Or like this:
(4x^2+4x-2)+ (-9x^2+ 7)
=4x^2+4x-2+ -9x^2+ 7
=4x^2+4x-2-9x^2+7

Answer 14

confusing me?

Answer 15

Well, I just took away the parentheses

Answer 16

k...next step

Answer 17

Well, we would regroup the terms:
4x^2+4x-2-9x^2+7
=4x^2-9x^2+4x-2+7

Answer 18

do u understand this

Answer 19

you distributed -1in the second parentheses

Answer 20

Well, I don't think I did, since the operation in front of the second parentheses is plus instead of minus

Answer 21

it looks like you grouped everything (like terms)together...but idk

Answer 22

well, I just took away the parentheses

Answer 23

Let's use numbers to understand that: (3+4)+(-9+7) = 3+4-9+7

Answer 24

ok...you took away the parentheses

Answer 25

So this is the next step:
4x^2+4x-2-9x^2+7
=4x^2-9x^2+4x-2+7

Answer 26

Sorry I have to go now