....PLzz answer me...ye rational Hai ya irrational ....
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irrational
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= ( 5 + 2√7 ) - 3√7
= 5 + 2√7 - 3√7
= 5 +√7(2-3).
= 5 + √7(-1)
= 5 - √7
So it is Irrational
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