Question

If f(x)=2x^2-x, find f(-4)-f(9)

Answer 1

Answer:

-117

Step-by-step explanation:

Hello!

If f(x)=2x^2-x, then f(-4) = 2(-4)^2 - (-4) = 2(16) + 4 = 36, and

                               f(9) =   2(9)^2 - 9 = 153

Therefore, f(-4) - f(9) = 36 - 153 = -117