Question

( x^2 +x ^3 -xy^2 +3 ) + ( x^3 +xy ^2 - xy -6)

 

Answer 1

\(=x^2+x^3-xy^2+3+x^3+xy^2-xy-6\)

\(=x^3+x^2-xy-3\)

Answer 2

       \((x^2+x^3-xy^2+3)+(x^3+xy^2-xy-6)\)

\(=\) \(x^2+x^3-xy^2+3+x^3+xy^2-xy-6\)

\(=x^2+(x^3+x^3)+\left(-xy^2-xy\right)+\left(3-6\right)-xy\)

\(=x^2+2x^3-2xy^2-3-xy\)