Question

No one is helping me please help me​

Answer 1

(1)
`-12x^(2) +28x-16`

Explanation:

`(3x-4)^(2) =3x(3x-4)-4(3x-4)\\=9x^(2) -12x-12x+16\\=9x^(2) -24x+16\\4x -3x^(2) -(9x^(2) -24x+16)\\\\4x-3x^(2) -9x^(2) +24x-16\\\\ -3x^(2) -9x^(2) +4x+24x-16\\-12x^(2) +28x-16`

Answer 2

First, solve the first part.
(3x-4)²=
=9x²-24x+16

...

Second, 9x²-24x+16-4x-3x²=
=6x²-28x+16

...

Therefore, the answer is #3