Question

Simplify: (x-y) (2x-y) +(x+y) (x+y)

Answer 1

Answer:

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

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