Sal explains what square-root equations are, and shows an example of solving such an equation and checking for extraneous solutions.
Extraneous solutions to radical equations is a free educational video by Khan Academy.It helps students in grades 9,10,11,12 practice the following standards HSA.REI.A.2.
1. HSA.REI.A.2 : Solve simple rational and radical equations in one variable, and give examples showing how extraneous solutions may arise..
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