题目内容
因式分解:
(1)3x-12x3
(2)6xy2+9x2y+y3.
(1)3x-12x3
(2)6xy2+9x2y+y3.
(1)3x-12x3
=3x(1-4x2)
=3x(1+2x)(1-2x);
(2)6xy2+9x2y+y3
=y(6xy+9x2+y2)
=y(3x+y)2.
=3x(1-4x2)
=3x(1+2x)(1-2x);
(2)6xy2+9x2y+y3
=y(6xy+9x2+y2)
=y(3x+y)2.
练习册系列答案
相关题目