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Prove that 3+2under root 5 is irrational

Answer» LET 3 + 2 root 5 is RATIONAL 
therefore 3 + 2 root 5=a/b 
root 5=a-3/2b 
because  a-3/2b is rational 
therefore root 5 will also be rational 
but we know that, 
root 5 is IRRATIONAL 
that is our SUPPOSITION is wrong 
that is 3+2 root 5 is irrational.



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