SOLUTION: I need help again, please help me add: (2x^2-3xy+y^2)+(-8x^2-8xy-y^2)+(x^2+xy-4Y^2) Thank you soooooooo much!!!

Question 191880: I need help again, please help me add:
(2x^2-3xy+y^2)+(-8x^2-8xy-y^2)+(x^2+xy-4Y^2)
Thank you soooooooo much!!!
Answer by nerdybill(7384) (Show Source): You can put this solution on YOUR website!
(2x^2-3xy+y^2)+(-8x^2-8xy-y^2)+(x^2+xy-4Y^2)
.
Remove parentheses:
2x^2-3xy+y^2-8x^2-8xy-y^2+x^2+xy-4Y^2
.
Group like-terms:
(2x^2-8x^2+x^2)+(-3xy-8xy+xy)+(y^2-y^2-4Y^2)
.
Combine like-terms:
(-5x^2)+(-10xy)+(-4Y^2)
-5x^2-10xy-4Y^2
or
-(5x^2+10xy+4Y^2)

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