Question

1√5+√2×√5
Rationalise the deninator

Answer 1

(√5 - √2)

explain:-

In the given question

5

+

2

1

Onrationalisingthenumber

=

5

+

2

1

×

5

−

2

5

−

2

Onapplying(a+b)(a−b)=a

2

−b

2

=

5

2

−

2

2

5

−

2

=

5−2

5

−

2

=

3

5

−

2