rationalise the denominator √7-5/√7+5
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(√7-5)/(√7+5) × (√7-5)/(√7-5)
=( 7-10√7+25)/(7-25)
=( 32-10√7)/(-18)
= (5√7-16)/9
= 5/9√7- 16/9 is ur answer
=( 7-10√7+25)/(7-25)
=( 32-10√7)/(-18)
= (5√7-16)/9
= 5/9√7- 16/9 is ur answer
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