Question

the number (3-2√2) (3+2√2) is

Answer 1

Answer:

1

Explanation:

$(3 - 2 \sqrt{2})(3 + 2\sqrt{2} ) \\ \\ (x + y)(x - y) = {x}^{2} - {y}^{2} \\ \\ {3}^{2} - ( 2\sqrt{2})^{2} = {3}^{2} - { \sqrt{8} }^{2} \\ \\ 9 - 8 = 1$