SOLUTION: Rationalize the denominator ______2____ √[3] + √[2]

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Question 225353: Rationalize the denominator

______2____
√[3] + √[2]

Answer by jsmallt9(3758)   (Show Source): You can put this solution on YOUR website!
Rationalizing denominators means to eliminate any irrational numbers (like square roots) from the denominator using proper Algebra! Your expression has a binomial (two term) denominator. To rationalize binomial denominators we use the following pattern: . This pattern shows how to take a two term expression, like (a+b) or (a-b), and make it turn into an expression of perfect squares, . Pairs of expressions like (a+b) and (a-b) are called conjugates. And when you multiply conjugates you get an expression containing nothing but perfect squares.

Let's use this on your problem:

Your denominator is of the form (a-b). So we will multiply the numerator and denominator by its conjugate, (a+b):

Using the distributive property on top and the pattern (or FOIL) on the bottom:

Simplifying:



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