Question

rationalise the denominator 1/✓7-✓5​

Answer 1

Please check the attachment

Answer 2

rationalise the denominator of

= 1/√7-√5

= 1/√7-√5 × √7+√5/√7+√5

= √7+√5/(√7)^2-(√5)^2

= √7+√5/7-5

= √7+√5/2

this is your answer

I hope this helps you