f(x) = 3x^2 - 6x
the function depends on x
find F(-9)
this means replace x with -9
f(-9) = 3(-9)^2 - 6(-9)
f(-9) =3 ( -9 x -9) - 6 (-9)
-9 x -9 = 81
f(-9) = 3 x 81 - 6 x -9
f(-9) = 243 + 54
f(-9) = 297
The answer is 297
