化简2(x²y+xy)-3(x²y-xy)-4x²y

来源：学生作业帮助网编辑：作业帮时间：2024/04/28 18:25:26

化简2(x²y+xy)-3(x²y-xy)-4x²y
化简2(x²y+xy)-3(x²y-xy)-4x²y

化简2(x²y+xy)-3(x²y-xy)-4x²y
2(x²y+xy)-3(x²y-xy)-4x²y
=2X^2Y+2XY-3X^2Y+3XY-4X^2Y
=-5X^2Y+5XY

2(x²y+xy)-3(x²y-xy)-4x²y
=2x²y+2xy-3x²y+3xy-4x²y
=(2x²y-3x²y-4x²y)+(2xy+3xy)
=-5x²y+5xy