问题
解答题
把下列各式分解因式:
(1)4x3-9x
(2)3x2y-12xy+12y.
答案
(1)4x3-9x,
=x(4x2-9),
=x(2x+3)(2x-3);
(2)3x2y-12xy+12y,
=3y(x2-4x+4),
=3y(x-2)2.
把下列各式分解因式:
(1)4x3-9x
(2)3x2y-12xy+12y.
(1)4x3-9x,
=x(4x2-9),
=x(2x+3)(2x-3);
(2)3x2y-12xy+12y,
=3y(x2-4x+4),
=3y(x-2)2.