Question

hii guys plz tell me the answer:
RATIONALISE THE DENOMINATOR OF THE FOLLOWING:

$10 \div \sqrt{7 - 5}$

Answer 1

heyyy

the answer is 5root 2

Answer 2

Given : 10 ÷ √7 - 5.

⇒ 10 ÷ √2

On rationalizing, we get

⇒ (10/√2) * (√2/√2)

⇒ (10√2)/(√2 * √2)

⇒ (10√2)/2

⇒ 5√2.

Hope it helps!