作业帮化简：2x²y+{2xy-[3x²y-2(-3x²y+2xy)]-4xy}化简：2x²y+{2xy-[3x²y-2(-3x²y+2xy)]-4xy}
来源：学生作业帮助网 编辑：作业帮 时间：2024/04/28 15:23:10
化简：2x²y+{2xy-[3x²y-2(-3x²y+2xy)]-4xy}化简：2x²y+{2xy-[3x²y-2(-3x²y+2xy)]-4xy}
化简：2x²y+{2xy-[3x²y-2(-3x²y+2xy)]-4xy}
化简：
2x²y+{2xy-[3x²y-2(-3x²y+2xy)]-4xy}
化简：2x²y+{2xy-[3x²y-2(-3x²y+2xy)]-4xy}化简：2x²y+{2xy-[3x²y-2(-3x²y+2xy)]-4xy}
2x²y+{2xy-[3x²y-2(-3x²y+2xy)]-4xy}
=2x²y+{2xy-[3x²y+6x²y-4xy]-4xy}
=2x²y+{-2xy-9x²y+4xy}
=2x²y+2xy-9x²y
=2xy-7x²y