Question

The value of (2+root 2) (2-root 2)

Answer 1

Explanation:

$= (2 + \sqrt{2} )(2 - \sqrt{2} ) \\ = 4 - 2 = 2$

Hope it will help you..

Answer 2

Answer:

it is of the form (a^2-b^2).

so,

2^2-root2^2

=4-2

=2