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

Is √20 a rational or irrational number ?explain how you know
asked 192k views
4 votes
Is √20 a rational or irrational number ?explain how you know

asked
User Sarme
by
7.9k points

2 Answers

2 votes
√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!!~~~ ^-^
answered
User Pete Johnson
by
7.8k points
5 votes
The square root of 20 is irrational.
42 is 16, less than 20 and 52 is 25, more than 20.
answered
User Tony Ennis
by
9.2k points
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