Question

Simplify. Please show all of your work.
2y + y^2 - xy -(xy - y +3y^2)

Answer 1

We have
\[2y + y^2 - xy -(xy - y +3y^2)\]

Let's open the bracket, being mindful that there is a minus sign before it
\[2y+y^2-xy-xy+y-3y^2\]
Let's group like terms
\[y^2-3y^2+2y+y-xy-xy\]
Let's combine the like terms, we get
\[-2y^2+3y-2xy\]