Question

Find (f*f)(3)

f(x)=x^2-x

A. 30
B. 6
C. 33
D. -6

Answer 1

A. 30

Explanation:

`(f\circ f)(x)=f\bigg(f(x)\bigg)\\\\f\bigg(f(3)\bigg)\\\\\text{Calculate}\ f(3):\\\\f(3)=3^2-3=9-3=6\\\\f\bigg(f(3)\bigg)=f(6)=6^2-6=36-6=30`