问题
解答题
把下列各式分解因式:
(1)3x3y-12xy3;
(2)(ab+a)+b+1.
答案
(1)3x3y-12xy3,
=3xy(x2-4y2),
=3xy(x+2y)(x-2y);
(2)(ab+a)+b+1,
=a(b+1)+(b+1),
=(b+1)(a+1).
把下列各式分解因式:
(1)3x3y-12xy3;
(2)(ab+a)+b+1.
(1)3x3y-12xy3,
=3xy(x2-4y2),
=3xy(x+2y)(x-2y);
(2)(ab+a)+b+1,
=a(b+1)+(b+1),
=(b+1)(a+1).