Question

(4x-y)(x+y)-2 (2x+y)(x-y) пожалуйсто помогите)))

Answer 1

(4x-y)(x+y)-2(2x+y)(x-y)
4x^2+4xy+xy-y^2(-4x-2y)•(x-y)
4x^2+4xy-xy-y^2-4x^2+4xy-2x+2y^2
5xy+y^2