Question

please say me this answer​

Answer 1

Answer:

$1 \div \sqrt{4}$

it's a answer

Answer 2

Rationalising the term gives-

(√10 - √5) ×√2 ÷ 2√2 × √2

= √20 - √10 ÷ 4

= 2√5 - √10 ÷ 4