(a的2次方-a)除a-1分之a

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(a的2次方-a)除a-1分之a(a的2次方-a)除a-1分之a(a的2次方-a)除a-1分之a=a(a-1)×(a-1)/a=(a-1)²=a²-2a+1解(a²-a)

(a的2次方-a)除a-1分之a
(a的2次方-a)除a-1分之a

(a的2次方-a)除a-1分之a
=a(a-1)×(a-1)/a
=(a-1)²
=a²-2a+1


(a²-a)÷a/(a-1)
=a(a-1)×(a-1)/a
=(a-1)²
=a²-2a+1