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Mathematics 35 Online
OpenStudy (anonymous):

add: (3x^2-4xy+y^2)+(-8x^2-9xy-y^2)+(x^2+xy-2y^2)

OpenStudy (immanuelv):

-4 x^2-12 x y-2 y^2

OpenStudy (amistre64):

( 3x^2 -4xy + y^2)+ (-8x^2 -9xy - y^2)+ ( x^2 + xy -2y^2) ------------------ -4x^2 -12xy -2y^2

OpenStudy (anonymous):

just combine like terms or similar terms

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