Question

Find the inverse of y=2√(x+3). Thanks!

Answer 1

y = f(x)
square both sides.
y^2=4(x+3).
now u have to make the x alone
y^2 / 4 =x+3
(y^2 / 4 ) - 3 = x
\[f^{-1}(x)\] = (x^2/4) - 3

Answer 2

thanks! I wasn't sure how to get rid of the square root. :)

Answer 3

no problem at all. :)
just square whenever u vanish the square root.