题目内容
因式分解:
(1)x3-2x2-3x;
(2)x4-16.
(1)x3-2x2-3x;
(2)x4-16.
(1)x3-2x2-3x,
=x(x2-2x-3),
=x(x-3)(x+1);
(2)x4-16,
=(x2+4)(x2-4),
=(x2+4)(x+2)(x-2).
=x(x2-2x-3),
=x(x-3)(x+1);
(2)x4-16,
=(x2+4)(x2-4),
=(x2+4)(x+2)(x-2).
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