Rationalize the denominator. 7/(√5 - 2)

College Algebra
7th Edition
ISBN:9781305115545
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
ChapterP: Prerequisites
SectionP.7: Rational Expressions
Problem 90E
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Rationalize the denominator.

7/(√5 - 2)

Expert Solution
Step 1

We have to rationalize the denominator:

75-2

If we have rational expression,

1a-b

then for rationalization of denominator we do multiply and divide by a+b.

So for the given expression multiplying and dividing by 5+2, we get

75-2×5-25-2=75+25-25+2

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