Question

若（p-q)的平方-(q-p)的三次方=(q-p)的平方乘E,则E是

Answer 1

(p-q)^2-(q-p)^3=(q-p)^2*E

(q-P)^2(1-q+p-E)=0

q=p,

如果q≠p,1-q+p-E=0

E=1-q+p.