Question
$x^2 – xy^2 – 2xy – y^2 = x^2 – (……..)$
✓
Answer
$x^2 – xy^2 – 2xy – y^2$
$= x^2 – (xy^2 + 2xy + y^2)$
$= x^2 – (xy^2 + 2xy + y^2)$
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