Question

Rationalize the denominator 2 root of 3 root of 7 minus root by5

Answer 1

Step-by-step explanation:

We use the identity (a+

b

)(a−

b

)=a

2

−b.

Multiply and divide

7

−2

1

by

7

+2 to get

7

−2

1

×

7

+2

7

+2

=

7−4

7

+2

=

3

7

+2

Hence, option A.