化简2x^2y-2xy+3y^2-(5x^2y+3xy-1)的结果是_____.
问题描述：
化简2x^2y-2xy+3y^2-(5x^2y+3xy-1)的结果是_____.
答
去括号,合并同同类项.
2x^2y-2xy+3y^2-(5x^2y+3xy-1)
=2x^2y-2xy+3y^2-5x^2y-3xy+1
=-3X^2Y-5XY+3Y^2+1.