What are root equations and how to solve them?
Root equations are equations containing a variable below a square root. This is a problem when you want to solve them. So root equations are often solved by squaring them in a good way:
First put the root on one side, then square the whole equation, then solve the
gotten equation. Solutions of that equations do not necessarily have to be solutions of the root equation cause squaring is no
equivalence transformation. Therefore, it is necessary
to try out if such a solution really solves the root equation.