How do you rationalize 3√75−√7?

1 Answer
Chaoyi Z.
May 8, 2015

You can rationalize 3√75−√7 by multiplying both the numerator and the denominator with the the denominator's conjugate

In this case, the denominator's conjugate is √7+5:
3√7⋅(√7+5)5−√7⋅(√7+5)

This means the rationalized answer is 15√7+2118

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