Question

x-y/x+y=9 and xy/x+y=-60 Then find (x+y)+(x-y)+xy=???

Answer 1

Here, x - y = 9(x + y)
xy = - 60(x+ y)
Now,
= (x+y) + (x-y) +xy
= (x + y) + (9(x + y)) +-60(x + y) ( substituting value of xy and x - y
= x + y + 9x + 9y - 60x - 60y
= - 50x - 50y
= - 50(x + y)
Hope this helps :)