Question Find the inverse of the quadratic function $f(x) = x^2 + 6x + 15$ by completing the square.

Studdy Solution
Finally, write the inverse function in function notation.
$$f^{-1}(x) = -3 + \sqrt{x - 6}$$
The equation of the inverse function is $f^{-1}(x) = -3 + \sqrt{x - 6}$.