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OpenStudy (anonymous):
Add. (2x^2-2xy+y^2)+(-6x^2-4xy-y^2)+(x^2+xy-8y^2)
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OpenStudy (anonymous):
-3 x^2-5 x y-8 y^2
OpenStudy (anonymous):
The parentheses don't matter for addition so you just add up all the similar variables. This becomes: -3x^2-5xy-8y^2
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