3x的平方×(x-y)+6x(y-x)
问题描述:
3x的平方×(x-y)+6x(y-x)
答
3x的平方×(x-y)+6x(y-x)
=3x的平方×(x-y)-6x(x-y)
=(x-y)(3x²-6x)
=3x(x-y)(x-2)