#1 1) (x+1)(x-x+1) 2) (a-2)(a2+2a+4) #2 1) (x+2)2 2) (3x-y)2 p.s решить

1) ( x + 1)(x - x + 1) =x² - x² + x + x - x + 1 = x + 1
2) ( a - 2)(a² + 2a + 4) = a³ - 2³ = a³- 8

1) (x + 2)² = x² + 4x + 4
2) ( 3x - y)² = 9x² - 6xy + y²