Answers

2015-10-10T21:13:19+05:30
X=2-y
y=2-x

=x^3 +6x (2-x) +(2-x)^3 -8

=x^3+12x-6x^2+8-x^3-12x+6x^2-8

=0

L.H.S.=R.H.S.
0