20-12-2015
Mathematics

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is √20 a rational or irrational number ?explain how you know

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Justwannalearn Justwannalearn

20-12-2015

The square root of 20 is irrational.
42 is 16, less than 20 and 52 is 25, more than 20.

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DarkBlue DarkBlue

20-12-2015

√20=√4*√5=2√5
√5-is a irrational number
===>2√5-is a irrational number =>√20 is a irrational number. :D
Have a nice day!!~~~ ^-^

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