In this article, we will solve more square-root equations. They're a little different than the equations you've solved before: they'll require more work for solving, and the problems will be more challenging …

We're asked to solve the equation, 3 plus the principal square root of 5x plus 6 is equal to 12. And so the general strategy to solve this type of equation is to isolate the radical sign on one side of the …

And to get rid of the radical, we're going to square both sides, and we've seen before that this process right over here, it's a little bit tricky, because when you're squaring a radical in a radical equation like …

Here's a video where Sal discusses square-root equations in general; he also talks about extraneous solutions, which are very important.

The inverse operation of taking the square is taking the square root. However, unlike the other operations, when we take the square root we must remember to take both the positive and the …

About this unit Simplify square roots and solve radical equations, identifying and checking for extraneous solutions. Unit guides are here! Power up your classroom with engaging strategies, tools, and …

Sal explains what square-root equations are, and shows an example of solving such an equation and checking for extraneous solutions. Created by Sal Khan and CK-12 Foundation.

Here's a video where Sal discusses square-root equations in general; he also talks about extraneous solutions, which are very important.

Solve square-root equations by first arranging them and then taking the square of both sides.

In this article, we will solve more square-root equations. They're a little different than the equations you've solved before: they'll require more work for solving, and the problems will be more challenging …