Question

Упростите выражение: (1+√(2))^2×(1-√(2))^2 - 1

Answer 1

(1+√(2))²×(1-√(2))² - 1=(1+2*√2+2)(1-2*√2+2)-1=
=1-2*√2+2+2*√2-8+4*√2+2-4*√2+4-1=0