Question

If f(x)=−3x2−2x+1, find 2[f(r)]

Please use your BIG BRAIN SKILLS this is the last question on my test please help..... :{

Answer 1

`-6x^2r-4xr+2r`

Explanation:

`f(x)=-3x^2-2x+1\\\\2[f(r)]`

Plug in the value of f of x into the second expression:

`2[(-3x^2-2x+1)(r)]`

Use the distributive property to distribute the two:

`2(-3x^2)+2(-2x)+2(1)[r]\\\\-6x^2-4x+2[r]`

Distribute each value among r:

`-6x^2r-4xr+2r`

:Done