因式分解:(1)m3-m(2)xn+2-2xn+1+xn(3)x2-11x-60(4)(x+y)2-4(x+y-1)
题型:解答题难度:一般来源:不详
因式分解: (1)m3-m (2)xn+2-2xn+1+xn (3)x2-11x-60 (4)(x+y)2-4(x+y-1) |
答案
(1)m3-m, =m(m2-1), =m(m-1)(m+1);
(2)xn+2-2xn+1+xn, =xn(x2-2x+1), =xn(x-1)2;
(3)x2-11x-60=(x-15)(x+4);
(4)(x+y)2-4(x+y-1), =(x+y)2-4(x+y)+4 =(x+y-2)2. |
举一反三
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