Question

Simplify(5-√2)(5+√2)​

Answer 1

using the identity (a+b)(a-b) = a2-b2

(5-√2)(5+√2) = 5^2 - (√2)^2

= 25-2

=23

Answer 2

3

Using (a+b)(a-b) = $a^2-b^2$

$(\sqrt{5})^2-(\sqrt{2})^2$

5-2

3

Hope it helps u

Have a great day ahead

Annyeong