Question

the number obtained on rationalising the denominator of 1/(7+2)*2 this 2 is square ​

Answer 1

Step-by-step explanation:

why do you think it's need to rationalise??

it's already free from surds.

it's answer will be not based on rationalisation

1/(7+2)^2= 1/(9)^2= 1/81

This is correct answer