SOLUTION: I'm having diffuculty solving this problem. Add; (9x^2-xy+y^2)+(-x^2-9xy+8y^2) DO I add across or???

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: I'm having diffuculty solving this problem. Add; (9x^2-xy+y^2)+(-x^2-9xy+8y^2) DO I add across or???      Log On


   

Question 362636: I'm having diffuculty solving this problem.
Add; (9x^2-xy+y^2)+(-x^2-9xy+8y^2)
DO I add across or???
Found 2 solutions by checkley77, nyc_function:
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
(9x^2-xy+y^2)
+(-x^2-9xy+8y^2) add.
----------------------
8x^2-10xy+9y^2 ans.

Answer by nyc_function(2741) About Me  (Show Source):
You can put this solution on YOUR website!
9x^2-xy+y^2 + -x^2-9xy+8y^2 =

8x^2 -10xy + 9y^2

Done!