Solving Radical Equations - Problem 11

After you have isolated the root in a radical equation, you are ready to un-do the root by square both sides. If you have a binomial, make sure to FOIL properly!! Then get all of the terms on the same side of the equals sign so that you can factor and solve for x. Then check to make sure your solution makes sense. A solution would be called extraneous if algebraically you didn't make any errors, but your x-value would be violating the rule that whatever is under the square root can not be negative. Check your solutions to make sure they're not outside the domain by substituting them in for x in the original equation.