Question

〈x一y〉的三次方乘以〈y一x)的二次方再乘以〈y一X)的五次方化简等于多少？

Answer 1

〈x一y〉的三次方乘以〈y一x)的二次方再乘以〈y一X)的五次方
=(x-y)^3.(y-x)^2 . (y-x)^5
=(x-y)^3.(x-y)^2 . [-(x-y)^5]
=-(x-y)^10