Question

Answer 1

a: C=A+B

=>\(C=x^2-2y+xy+1+x^2+y-x^2y^2-1\)

=>\(C=2x^2-y+xy-x^2y^2\)

b: C+A=B

=>C=B-A

=>\(C=x^2-x^2y^2+y-1-x^2+2y-xy-1\)

=>\(C=3y-x^2y^2-xy-2\)

Answer 2

\(a,C=A+B\) \(\Rightarrow x^2-2y-xy+1+y+x^2-x^2y^2-1\) \(=2x^2-y+xy-x^2y^2\)

\(b,C+A=B\Rightarrow C=B-A\)

\(\Rightarrow C=x^2-x^2y^2+y-1-x^2+2y-xy-1\Rightarrow3y-x^2y^2-xy-2\)