Add, 2xsquare-8xy+7ysquare-8xysquare, 2xysquare+6xy-ysquare+3xsquare, 4ysquare-xy-xsquare+xysquare
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Step-by-step explana
= 2 x^2 + 3x^2 - x ^2 + 7y^2 - y^2 + 4y^2- 8xy^2 + 2xy^2 + xy ^2 - 8xy + 6xy - xy
=4 x^2 + 10 y^ 2 - 5xy ^2 - 3xy
First arrange the like terms in order then add or sub according to the symbols.....then you will get the answer.....
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