Here's the question you clicked on:
radh
Find the inverse of y=2√(x+3). Thanks!
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
thanks! I wasn't sure how to get rid of the square root. :)
no problem at all. :) just square whenever u vanish the square root.