(a的平方-a)除以(a-1)分之a

问题描述:

(a的平方-a)除以(a-1)分之a

a平方`(当A不等于1)

(a^2-a)/[a/(a-1)]
=a(a-1)*(a-1)/a
=(a-1)^2
=a^2-2a+1.

(a的平方-a)除以(a-1)分之a
=(a^2-a)/[a/(a-1)]
=(a^2-a)*(a-1)/a
=a(a-1)*(a-1)/a
=(a-1)^2