Question

Given the following function, find f (− 3 x) . f ( x )  =  − 8 x 2 − 6

Answer 1

\[f(x)=-8x^2-6\]
so to evaluate f(-3x) just put -3x in place of x
\[f(-3x)=-8(-3x)^2-6=-72x^2-6\]

Answer 2

oh ok

Answer 3

if that is true wouldn't it cancel out the negatives \[f(-3)=-8(-3x)^2-6=72x^2-6\]

Answer 4

-8*(-3x)^2=(-8)*(-3x)*(-3x) so one negetive remains

Answer 5

got it

Answer 6

:)