Question

I dont understand this question, please help me

Answer 1

-2x^2 + 6x + 4

Explanation:

We are subtracting whole of 7x^2 + 4x - 9) so we put it into parentheses. So we have:-

5x^2 + 10x - 5 - (7x^2 + 4x - 9)

First distribute the negative over the parentheses

= 5x^2 + 10x - 5 - 7x^2 - 4x + 9

Now bring like terms together and simplify:-

= 5x^2 - 7x^2 + 10x - 4x - 5 + 9

= -2x^2 + 6x + 4 (answer)

Answer 2

2(x²+7x-7)

did it help?

Explanation:

7x²+4x-9-5x²=10x-5

2x²+14x-14

2(x²+7x-7)