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# Recognizing rational & irrational expressions

Sal shows how to determine whether the following expressions are rational or irrational: 9 + √(45), √(45)/ (3*√(5)), and 3*√(9). Created by Sal Khan.

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# Recognizing rational & irrational expressions

Current time:0:00Total duration:2:36

0 energy points

Sal shows how to determine whether the following expressions are rational or irrational: 9 + √(45), √(45)/ (3*√(5)), and 3*√(9). Created by Sal Khan.