题目内容

将下列各式分解因式:
(1)3x-12x3
(2)(x2+y22-4x2y2
(1)3x-12x3
=3x(1-4x2),
=3x(1+2x)(1-2x);

(2)(x2+y22-4x2y2
=(x2+y2+2xy)(x2+y2-2xy),
=(x+y)2(x-y)2
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