问题
填空题
分解因式:(x-y)2-(3x2-3xy+y2)=______.
答案
(x-y)2-(3x2-3xy+y2),
=x2-2xy+y2-3x2+3xy-y2,
=-2x2+xy,
=x(y-2x).
分解因式:(x-y)2-(3x2-3xy+y2)=______.
(x-y)2-(3x2-3xy+y2),
=x2-2xy+y2-3x2+3xy-y2,
=-2x2+xy,
=x(y-2x).