Solve for each function

Question

Given the function f, find f(−2), f(4), f(−a), −f(a), f(a + h).

f(x) = −4x^2 + 2x

 

f(−2) =

f(4) =

f(−a) =

−f(a) =

f(a + h) =

Answer 1

I respectfully ask you to substitute the various arguments into the expression defining function f to get all of your answers.

 

f(a+h) will be -4(a+h)² + 2(a+h) and you just use your algebra skills to square the binomial (be sure you get a trinomial!) and then distribute throughout, and collect like terms.