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Mathematics 13 Online
OpenStudy (anonymous):

(8x^2-xy+y^2)+(-x^2-5xy+2y^2) add

OpenStudy (anonymous):

7x^2-6xy+3y^2

OpenStudy (angela210793):

(8x^2-xy+y^2)+(-x^2-5xy+2y^2) =8x^2-xy+y^2-x^2-5xy+2y^2=7x^2-6xy+3y^2

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