Question

simplify (2+√2)(2-√2)

Answer 1

Answer:

2

Step-by-step explanation:

given : { 2 + [2^(1/2)] } * { 2 - [2^(1/2)] }

we know that,

(a+b) * (a-b) = a^2 - b^2

hence,

{ 2 + [2^(1/2)] } * { 2 - [2^(1/2)] }  =  2^2 - { [2^(1/2)]^2 }

                                                 = 4 - 2

                                                 = 2

Answer 2

Answer:

The answer is 2.

Step-by-step explanation:

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

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

Hope it helps u.

Have a great day ahead

Annyeong