Question

How do you find the inverse of `y=x^2+2x-1`?

Answer 1

The inverse is `f^-1(x) = sqrt(x+2) -1`

Explanation:

It's quite simple. Always deal with quadratic functions by completing the square and then making `x` the subject in terms of `y`. Replace `y` by `x` to write the final expression for inverse.

Hope that helps,
Cheers.