SOLUTION: Please help me solve (3x^2-2xy+y^2)+(-9x^2-9xy-y^2)+x^2+xy-5y^2)

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Please help me solve (3x^2-2xy+y^2)+(-9x^2-9xy-y^2)+x^2+xy-5y^2)      Log On


   

Question 401740: Please help me solve
(3x^2-2xy+y^2)+(-9x^2-9xy-y^2)+x^2+xy-5y^2)
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
(3x^2-2xy+y^2)+(-9x^2-9xy-y^2)+x^2+xy-5y^2)
---
Gather like terms.
= (3x^2-9x^2+x^2)+(-2xy-9xy+xy)+(y^2-y^2-5y^2)
----
= -5x^2-10xy-5y^2
---
= -5(x^2+2xy+y^2)
---
Factor:
= -5(x+y)^2
==============
Cheers,
Stan H.