## Intermediate Algebra for College Students (7th Edition)

$2$
RECALL: $f(a)$ represents the value of the function $f$ when $x=a$. Thus, $f(4)$ represents the value of the function $f$ when $x=4$. Substitute $4$ to $x$ in the function $f$ to obtain: $f(4) = 4^2-5(4)+6 \\f(4)=16-20+6 \\f(4)=-4+6 \\f(4)=2$