Question

a²-2a+1分之a²-1除以a的三次方-a²分之a+1,其中a=根号3

Answer 1

a^2-2a+1=(a-1)^2

a^2-1=(a+1)(a-1)

a^3-a^2=a^2(a-1)

所以，原式=[(a+1)/(a-1)]*[a^2(a-1)/(a+1)]=a^2=3