Question

Find f(-5) if f(n) = n^3 + 3n^2?

A) -50


B) -7


C) 0


D) 22

Answer 1

Subst. -5 for n in f(n) = n^3 + 3n^2:

f(-5) = (-5)^3 + 3(-5)^2

= -125 + 75 = -50