Question

F(x) = 4x - 4, g(x) = - 3x² + 2x - 3, and h(x) = - 2x^2- 5, find f(-4)

Answer 1

-20

Explanation:

f(x) = 4x - 4

f(-4) = 4*-4 - 4

f(-4) = -16 - 4

f(-4) = - 20

• f(x) shares many of the properties of y so you could think of this question as y = 4x - 4
• The difference is as in this question that f(-4) conveys the message that wherever you see an x on the right side of the equation, you put -4 in it's place.
• That's what was done on the second step.