SOLUTION: Hi! Could someone please help me to know if I am correct on this equation? Add:(2x^2-9xy+y^2)+(-8x^2-9xy-y^2)+(x^2+xy-3y^2) I obtain the answer: -5x^2-17xy-3y^2. Am I corr

Algebra ->  Complex Numbers Imaginary Numbers Solvers and Lesson -> SOLUTION: Hi! Could someone please help me to know if I am correct on this equation? Add:(2x^2-9xy+y^2)+(-8x^2-9xy-y^2)+(x^2+xy-3y^2) I obtain the answer: -5x^2-17xy-3y^2. Am I corr      Log On


   

Question 468513: Hi! Could someone please help me to know if I am correct on this equation?
Add:(2x^2-9xy+y^2)+(-8x^2-9xy-y^2)+(x^2+xy-3y^2)
I obtain the answer: -5x^2-17xy-3y^2.
Am I correct?
Thanks! Huge final exam due soon!!
Answer by bucky(2189) About Me  (Show Source):
You can put this solution on YOUR website!
Yes, you are correct!
As a check, your work should show:
.
%2B2x%5E2+-+8x%5E2+%2B+x%5E2+=+-5x%5E2
.
-9xy+-+9xy+%2B+xy+=+-17xy
.
and
.
%2By%5E2-+y%5E2+-+3y%5E2+=+-3y%5E2
.
Good luck on your exam.