Question

2 For f(x)=3x(x + 5), find f (-2).
A-18
B 18
C -42
D 42

Answer 1

A. -18

Explanation:

» Application

To find the value of f(-2), we have to plug in the value of -2 for each x in the equation.

» Solution

• 
  `f(-2)=3(-2)(-2+5)`
• 
  `f(-2)=-6(3)`
• 
  `f(-2)=-18`

Thus, f(-2) = A. -18.