Question

6. If F(x) = -6(2x2 + 5x) - 9, what is the value of F(-4)?

Answer 1

-81

Explanation:

-6(2x² + 5x) - 9

substitute -4 for 'x'

-6[2(-4)² + 5(-4)] - 9

-6[2(16) + (-20) - 9]

-6(32 - 20) - 9

-6(12) - 9

-72 - 9 = -81