Question

Given f(x) = x² + 4x - 3, find f(-3)
O -3
O -6
O 0
O 18

Answer 1

f(-3) = -6

Explanation:

f(x) = x^2 + 4x - 3

f(-3) means to put -3 in place of x and then do the calculation.

f(-3)

= (-3)^2 + 4(-3) - 3

= 9 - 12 - 3

= -3 - 3

= -6

First square -3, its 9. Then multiply -3 and 4, that's -12. Then add everything.

f(-3) = -6