Question

Part 3: Find the inverse function, f –1(x), for the function f (x) = x2 + 10x + 28.

Answer 1

-5+(√x-3) and -(√x-3)-5

Explanation:

change f(x) to 'y' and then interchange x and y; then solve for y

y = x² + 10x + 28

x = y² + 10y + 28

you can use the Quadratic Formula to evaluate y² + 10y + 28 and will get:

-5+(√x-3) and -(√x-3)-5