A) 2x^2 + xy - x^2 - 2xy + y^22x^2 + xy - x^2 - 2xy + y^2x^2 + y^2 - xy
Б) (x + y)^2 - 2xy + x^2x^2 + 2xy + y^2 - 2xy + x^22x^2 + y^2
A) 2x^2 + xy - x^2 - 2xy + y^2
2x^2 + xy - x^2 - 2xy + y^2
x^2 + y^2 - xy
Б) (x + y)^2 - 2xy + x^2
x^2 + 2xy + y^2 - 2xy + x^2
2x^2 + y^2