Which equation can be simplified to find the inverse of y = x2 – 7?
y = x2 + 7
To find an inverse:
First: interchange x and y ---> x = y2 + 7
Second: solve for y: ---> y2 + 7 = x
y2 = x - 7
y = +/- sqrt(x - 7)
Because of the +/- sign, there is no unique inverse.
