Question

Rationalise the denominator 1 by
7-√2​

Answer 1

Answer:

1÷ 7−2

rationalisingthedenominator

1/√7-2 x √7+2 /√7+2

= √7+2 / (√7)²-(2)²

= √7+2 / 7-4

= √7+2/ 3 is the answer.

Answer 2

Answer:

(7 - root 2)×(7+root 2) ....[a^2-b^2 ]

=7^2- root 2 ^2

= 49-2

=47