Question

F(x)=2x ^2 −x−12 find f(8)

Answer 1

108

Explanation:

put 8 in for x

2*8^2-8-12

2*64-8-12

128-8-12

108

Answer 2

f(8) = 108

Explanation:

to evaluate f(8) , substitute x = 8 into f(x)

f(x) = 2x² - x - 12 , then

f(8) = 2(8)² - 8 - 12 = 2(64) - 20 = 128 - 20 = 108