SOLUTION: Add: (5x^2-xy+y^2) + (-x^2-9xy+8y^2)

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Question 478946: Add:
(5x^2-xy+y^2) + (-x^2-9xy+8y^2)
Answer by wilft1(217) About Me  (Show Source):
You can put this solution on YOUR website!
you can only add "like" nomials, like, xy^2 + xy^2 or a^2 + a^2
not ab^2 + ab^3 or xy + ab^2
soooo...
(5x^2-xy+y^2) + (-x^2-9xy+8y^2) for the answer, i will put them in decending order
9y^2+4x^2-10xy