Question

Нужно срочно упростить: (2x+y)^2-(2x+y)^2

Answer 1

$4x^2+4xy+y^2+(-4x^2-4xy-y^2)$
$4x^2+4xy+y^2-4x^2-4xy-y^2$
$y^2+4xy-4xy-y^2$
$4xy-4xy+0$
$0+0$
$0$

Answer 2

(2x+y)^2-(2x+y)^2=
$4 {x}^{2} + 4xy + {y}^{2} - 4 {x}^{2} - 4xy - {y}^{2} = 0$