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Prove 3+2√5 is irrational

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Prove 3+2√5 is irrational

Posted by Sahil Singh 7 years, 1 month ago

CBSE > Class 10 > Mathematics

2 answers

Deepak Kumar 7 years, 1 month ago

Yes it is irrational no.

1Thank You

Keshab Sadotra 7 years, 1 month ago

Let 3+2root 5 be rational and 3+2root5 =r where r is rational. 3+2root5=r 2root5=r-3 Root5=r-3\2 Thereforer-3/2 is rational Root5 is also rational But this is a contradiction as we know that root5 orrational. Therefore.3+2root5 is irrational

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Posted by Kanika . 4 weeks, 1 day ago

CBSE > Class 10 > Mathematics