Question

If f(x) = x2 - 4x and f(-3), then the result is:
o -3.
O 21.
0 -21.

Answer 1

answer is 6

Explanation:

f(x) = x2 - 4x

f(-3)= -3*2-4*-3

=-6-(-12)

=6

Answer 2

This is pretty much saying that if x = -3, then solve for the equation, so (-3)^2 - 4(-3) = 9 - 12 = -3