Question

Rationalize this irrational no. 1/(√5-√3)

Answer 1

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Answer:

1/(root5 - root3)

Rationalising

1/(root5 - root3) × (root5 + root3) / (root5 + root3)

--> root5 + root3 / 5 - 3

In denominator use identity (a-b)(a+b) = a2 - b2

--> root5 + root3 / 2