Originally Posted by HappyFeet x= -4√x+12
now, squaring both sides and solve the quadratic eqn.
Originally Posted by HappyFeet X= -4√x+12
(Shake) What are you trying to do? Solve for x? Then: .
One of the solutions to this equation is the solution to , the other is not (it's an extraneous solution and is in fact the solution to ).