(2x-3y)-(5x-y)
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(2x-3y)-(5x-y)(2x-3y)-(5x-y)(2x-3y)-(5x-y)(2x-3y)-(5x-y)=2x-3y-5x+y……………………去括号=(2-5)x+(-3+1)y…………………
(2x-3y)-(5x-y)
(2x-3y)-(5x-y)
(2x-3y)-(5x-y)
(2x-3y)-(5x-y)
=2x-3y-5x+y ……………………去括号
=(2-5)x+(-3+1)y ……………………合并同类项
=-3x-2y
望采纳,O(∩_∩)O谢谢
楼主你好!很高兴为你
首先要去括号,然后合并同类项~
(2x-3y)-(5x-y)
=2x-3y-5x+y
=(2x-5x)+(y-3y)
=-3x-2y
这样解说希望楼主能理解,不清楚的话欢迎追问交流,希望能帮到楼主~
2x-3y-5x+y 记住去括号,括号外面是“-”的,里面都要变号,合并同类项。
2x-5x-3y+y
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