Question

Given f(x) = 3x3 + 8x2 – 10x – 12, find f(3). A) f(3) = 84 B) f(3) = 96 C) f(3) = 111 D) f(3) = 123

Answer 1

C) f(3) = 111

Explanation:

f(x) = 3x^3 + 8x^2 – 10x – 12

Let x=3

f(3) = 3(3)^3 + 8(3)^2 – 10(3) – 12

=3*27+8(9) -30-12

=81+72-30-12

=111