化简(a3-a2-a+1)/(a3-3a2+3a-1)的过程

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化简(a3-a2-a+1)/(a3-3a2+3a-1)的过程化简(a3-a2-a+1)/(a3-3a2+3a-1)的过程化简(a3-a2-a+1)/(a3-3a2+3a-1)的过程=(a²(

化简(a3-a2-a+1)/(a3-3a2+3a-1)的过程
化简(a3-a2-a+1)/(a3-3a2+3a-1)的过程

化简(a3-a2-a+1)/(a3-3a2+3a-1)的过程
=(a²(a-1)-(a-1))/(a-1)³
=(a-1)*(a²-1)/(a-1)³
=(a-1)²(a+1)/(a-1)³
=(a+1)/(a-1)

X=2A 3,Y=4-A;X