问题
计算题
因式分解:
(1)x3﹣2x2﹣3x;
(2)x4﹣16.
答案
解:(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).
因式分解:
(1)x3﹣2x2﹣3x;
(2)x4﹣16.
解:(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).