(p-2q)^3=-(2q-p)^3有哪两种处理方法?

问题描述:

(p-2q)^3=-(2q-p)^3有哪两种处理方法?

(1)
(p-2q)^3=[-1×(2q-p)]^3=-(2q-p)^3
(2)
(p-2q)^3=(-1)³(2q-p)^3=-(2q-p)^3