Question

Find the inverse of the function y = x2 – 12.

Answer 1

y = x2 - 12

Inverses are symmetrical with respect to line y=x on xy plane.

So replace y with x and x with y in the equation you are given.

We get

x = y^2 - 12

y^2 = x+12

y = \(\sqrt{x+12}\)

That is the inverse.

Understood? :)