Question

what is (2+sqrt4)(2-sqrt4) multiplied?

Answer 1

0 - because the sqrt4=2 so you got (2+2)(2-2)=0

Answer 2

\[(a+b)(a-b) = a^2 - b^2\]

Answer 3

\[\sqrt{4}==+2 or -2\]

Answer 4

\[(2+\sqrt{4})(2-\sqrt{4})=4-4=0\]

Answer 5

4-4=0