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Solving an Equation with Radicals - Problem 8

Teacher/Instructor Alissa Fong
Alissa Fong

MA, Stanford University
Teaching in the San Francisco Bay Area

Alissa is currently a teacher in the San Francisco Bay Area and Brightstorm users love her clear, concise explanations of tough concepts

If a root is equal to a binomial in an equation that you wish to solve, you will be squaring both sides to "undo" the radical. Don't forget that when you square the binomial side, you will need to use FOIL or some other accurate method of expanding the bionomial product. Once you thin you have the solution(s), you'll need to substitute them back in to the original equation to make sure the solution isn't extraneous. The radicand, or whatever is under the square root sign, needs to be greater than or equal to zero.

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