计算:〔x(x*2y*2-xy)-y(x*2-x*3y)〕÷3x*2 y
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/18 01:08:35
计算:〔x(x*2y*2-xy)-y(x*2-x*3y)〕÷3x*2 y
〔x(x*^2y^2-xy)-y(x^2-x^3y)〕÷3x^2 y
=(x*xy(xy-1)-yx^2(1-xy))÷3x^2y
=(x^2y(xy-1)+x^2y(xy-1))÷3x^2y
=x^2y(xy-1)*2÷3x^2y
=2(xy-1)/3
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来源:学生作业帮助网 编辑:作业帮 时间:2024/06/18 01:08:35
计算:〔x(x*2y*2-xy)-y(x*2-x*3y)〕÷3x*2 y
〔x(x*^2y^2-xy)-y(x^2-x^3y)〕÷3x^2 y
=(x*xy(xy-1)-yx^2(1-xy))÷3x^2y
=(x^2y(xy-1)+x^2y(xy-1))÷3x^2y
=x^2y(xy-1)*2÷3x^2y
=2(xy-1)/3