prove (3 root2+root5) is irrational number check whether (3 root2+ root5)(3 root2-root5) is rational or irrational
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let 3√2+√5=a\b where b is not equal to 0
and we will assume a/b a rational number
now 3√2+√5=a/b
and we will assume a/b a rational number
now 3√2+√5=a/b
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