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Best Answer

4x^2+2xy-3y^2-2x^2+5xy-2y2

Collect the like terms

=2x^2+7xy-5y^2

We cannot factorise it because the end term is a negative whilst the second-last term is positive.

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Q: 4x2 plus 2xy-3y2 plus -2x2 plus 5xy-2y2?
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