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=______.
答
x2y-2xy-y=y(x2-2x-1)
=y(x2-2x+1-2)=y[(x-1)2-(
)2]
2
=y(x-1+
)(x-1-
2
),
2
故答案为:y(x-1+
)(x-1-
2
).
2