Question

can anyone tell me the ans for this question plzz fast

Answer 1

Here is the answer check it

Answer 2

Hi ,

1 ) 7√3/( √10 + √3 )

= [ 7√3 ( √10 - √3 )/[(√10+√3)(√10-√3)]

= [7√3(√10-√3)]/(10 - 3)

= [7√3(√10-√3)]/7

= √3(√10 - √3)

= √30 - 3 ------( 1 )

2 ) 2√5/( √6 + √5 )

= [ 2√5(√6-√5)]/[(√6+√5)(√6-√5)]

= [2√5(√6-√5)]

= 2√30 - 10 -----( 2 )

3 ) 3√2/( √15 + 3√2 )

=[ 3√2(√15-3√2)]/[(√15+3√2)(√15-3√2)]

= [ 3√2(√15-3√2)]/[15 - 18 ]

= [ 3√2 ( √15 - 3√2 )] / ( -3 )

= -√2( √15 - 3√2 )

= - √30 + 6 ---- ( 3 )

Now , according to the problem given ,

( 1 ) - ( 2 ) - ( 3 )

= √30 - 3 - ( 2√30 - 10 ) - ( - √30 + 6 )

= √30 - 3 - 2√30 + 10 + √30 - 6

= 10 - 9

= 1

I hope this helps you.

:)