Question

plz tell me answe this quetion​

Answer 1

( √5 + √2 )²

BY USING ( a + b )^2 = a^2 + b^2 + 2ab

( √5 + √2 )²

⇒ ( √ 5 )² + ( √ 2 )² + 2( √5 × √ 2 )

⇒ 5 + 2 + 2√( 5 × 2 )

⇒ 5 + 2 + 2√10

⇒ 7 + 2√10