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OpenStudy (anonymous):
Add (5x^2-9xy+y^2)+(-8x^2-7xy-y^2)+(x^2+xy-4y^2)
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OpenStudy (precal):
drop all of the () since you are distributing a positive 1, then combine like terms
OpenStudy (anonymous):
-2x^2-15xy-4y^2
OpenStudy (anonymous):
is this correct?
OpenStudy (precal):
yes, you are correct
OpenStudy (anonymous):
thank you
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