x(a-x)(a-y)-y(x-a)(y-a)怎么因式分解

分类: 作业答案 • 2021-12-18 22:03:43

问题描述：

答

x(a-x)(a-y)-y(x-a)(y-a)
=(x-y)(a-x)(a-y)
因为同时改变式子中的两个数的符号结果还相等，所以（x-a)(y-a)=(a-x)(a-y)

答

x(a-x)(a-y)-y(x-a)(y-a)
=x(a-x)(a-y)-y[-(a-x)][-(a-y)]
=x(a-x)(a-y)-y(a-x)(a-y)
=(a-x)(a-y)(x-y)

答

x(a-x)(a-y)-y(x-a)(y-a)
=x(a-x)(a-y)-y(a-x)(a-y)
=(a-x)(a-y)（x-y）