Question

Rationalize this 1/5+√2

Answer 1

Answer:

Correct option is

D

3

(

5

−

2

)

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

Hence, correct answer is option D.