Question

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RATIONLISE DENOIMINTAR​

Answer 1

Answer:

1/√5-√7

=(1/√5-√7)*(√5+√7/√5+√7)

Now using (a+b)(a-b)=a²-b²

=√5+√7/(√5)²-(√7)²

=(-√5+√7/2)

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