Question

[2x^2-xy-{xy-(2x^2-x^2-y^2)}]

Answer 1

Answer:

[2x^2 - xy - { xy - ( x^2 - y^2 ) }]

[2x^2 - xy - { xy - x^2 + y^2 }]

[2x^2 - xy - xy + x^2 - y^2]

[3x^2 - 2xy - y^2]