题目内容

因式分解:
(1)4x3-36x;
(2)(y+2)(y+4)+1
(3)(x2+1)2-10(x2+1)+25.
(1)4x3-36x,
=4x(x2-9),
=4x(x+3)(x-3);

(2)(y+2)(y+4)+1,
=y2+6y+9,
=(y+3)2

(3)(x2+1)2-10(x2+1)+25,
=(x2+1-5)2
=(x+2)2(x-2)2
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