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分解因式x3﹣xy2的结果是 .
(1)x3-4x;
(2)2a3b+8a2b2+8ab3;
(3)a2-2a-b2+2b;
(4)am+bm+a+b;
(5)7xn+1-14xn+7xn-1(n为不小于1的整数).
分解因式x3-x的结果是
x(x2-1)
x(x-1)2
x(x+1)2
x(x+1)(x-1)