Question

x+y,x-y,-x-y,-x+y add the followong ploynomials​

Answer 1

Answer:

if we subtract the equation we will get the answer minus y

Answer 2

@brainly..

heya here is the answer....

(x+y)+(x–y)+(–x–y)+(–x+y)

x+y+x–y–x–y–x+y

2x–2x+2y–2y

0+0

0