问题 解答题

分解因式

(1)x2y-2xy2+y3

(2)x(x-y)-y(y-x)

答案

(1)x2y-2xy2+y3

=y(x2-2xy+y2

=y(x-y)2

(2)x(x-y)-y(y-x)

=(x-y)(x+y).

单项选择题 A1/A2型题
单项选择题