来自江明德的问题
【整体去括号;化简[5(x-y)-3(x-y)-(x-y)+2(x-y)]-2(x-y)】
整体去括号;化简[5(x-y)-3(x-y)-(x-y)+2(x-y)]-2(x-y)
2回答
2019-12-28 02:10
【整体去括号;化简[5(x-y)-3(x-y)-(x-y)+2(x-y)]-2(x-y)】
整体去括号;化简[5(x-y)-3(x-y)-(x-y)+2(x-y)]-2(x-y)
[5(x-y)-3(x-y)-(x-y)+2(x-y)]-2(x-y)
=(5-3-1+2)(x-y)-2(x-y)=(3-2)(x-y)=x-y
中间是什么?不懂