Question

(2+root2)(2-root2)solve it​

Answer 1

2+root 2(2-root 2)

4-2root2 +2root2 -2

4-2

2

Answer 2

Answer:

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

That's the answer