Question

4+(-x^2-2xy-y^2) помогите пожалуйста​

Answer 1

$4-{x}^{2} - 2xy - {y}^{2} \\ 4 - ( {x}^{2} + 2xy + {y}^{2} ) \\ 4 - {(x + y)}^{2} \\ (2 - (x + y)) \times (2 + (x + y)) \\ (2 - x - y) \times (2 + x + y)$