Question

If f(x) = 2x2 + x-1, then f(-5)
= ?

Answer 1

f(-5) = -2

Explanation:

f(-5) = 2x2 + -5 -1

f(-5) = 4 - 6

f(-5) = -2

Answer 2

-54

Explanation:

(-5)^2 = -25

2(-25)+ -5 +1 =-54