Question

Given the function rule f(x)= x^-2 - 4x + 3, what is the output of f(-3)?

A. 24
B. 21
C. 0
D. -3

Answer 1

input -3 for x
f(-3)=(-3)^2-4(-3)+3
f(-3)=9+12+3
F(-3)=24

A

Answer 2

f(-3) = 15,111111

Explanation:

In order to find out f(-3), we need to substitute x with -3.

Since f(x)= x^-2 - 4x + 3,

f(-3) = (-3)^-2 -4(-3) + 3

f(-3) = 1/9 + 12 + 3

f(-3) = (1 + 108 + 27) / 9

f(-3) = 136 / 9

f(-3) = 15,111111