Question

Find f(-2) when f(x) = 2x2 + 5x - 4
A) -10 B) -6
C) 2 D) 14

Answer 1

-6

Explanation:

f(x) = 2x2 + 5x - 4

Let x=-2

f(-2) = 2*(-2)^2 + 5(-2) - 4

= 2 * 4 +5(-2) -4

= 8-10-4

= -6