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 …

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 …

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.

Gain more insight into the quadratic formula and how it is used in quadratic equations. The quadratic formula helps you solve quadratic equations, and is probably one of the top five …

- [Voiceover] Let's say that we have the equation six plus three w is equal to the square root of two w plus 12 plus two w. See if you can pause the video and solve for w, and it might have …

"Let's square both sides of this equation." So we might say that this is the same thing as two-x minus one squared is equal to the square root of eight minus x, eight minus x squared, and …

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

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 …

Sal solves the equation 2x^2+3=75 by isolating x^2 and taking the square root of both sides. Created by Sal Khan and Monterey Institute for Technology and Education.