问题
解答题
分解因式: (1)-4x2+12xy-9y2; (2)
|
答案
(1)-4x2+12xy-9y2,
=-(4x2-12xy+9y2),
=-(2x-3y)2;
(2)
ab2-2a,1 2
=
a(b2-4),1 2
=
a(b+2)(b-2).1 2
分解因式: (1)-4x2+12xy-9y2; (2)
|
(1)-4x2+12xy-9y2,
=-(4x2-12xy+9y2),
=-(2x-3y)2;
(2)
ab2-2a,1 2
=
a(b2-4),1 2
=
a(b+2)(b-2).1 2