Question

Evaluate the expression f(x) = 3x^2 - 9 if f (-3)

Answer 1

18

Explanation:

Substitute in -3 into all the x values of f(x)

f(-3) = 3(-3)^2 - 9

f(-3) = 3(9) - 9

f(-3) = 27 - 9

f(-3) = 18

Hope this helps :)