合并同类项5(x-y)+2(x-y)-3(x-y)
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合并同类项5(x-y)+2(x-y)-3(x-y)
合并同类项5(x-y)+2(x-y)-3(x-y)
合并同类项5(x-y)+2(x-y)-3(x-y)
这还用合并?多明显啊,等于4(x-y)
4(x-y)
=4(X-Y)
4x-4y
5x-5y+2x-2y-3x+3y=4(x-y)
合并同类项5(x-y)+2(x-y)-3(x-y)
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将2(x+y)-3(x-y)-4(x+y)+5(x-y)-3(x-y)合并同类项得:( )