在实数范围内分解因式x2y-2xy-y=_.

问题描述:

在实数范围内分解因式x2y-2xy-y=______.

x2y-2xy-y=y(x2-2x-1)
=y(x2-2x+1-2)=y[(x-1)2-(

2
)2]
=y(x-1+
2
)(x-1-
2
),
故答案为:y(x-1+
2
)(x-1-
2
).