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因式分解:
(1)x3-16x
(2)9(x+y)2-6(x+y)+1.
人气:127 ℃ 时间:2020-01-29 21:23:36
解答
(1)x3-16x,
=x(x2-16),
=x(x+4)(x-4);
(2)9(x+y)2-6(x+y)+1,
=[3(x+y)-1]2
=(3x+3y-1)2
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