(a²-2)/(a²-2a+1) ÷ (a+1)/(a³-a²)
=(a²-2)/(a-1)² × a²(a-1)/(a+1)
=(a²-2)/(a-1) × a²/(a+1)
=a²(a²-2)/(a²-1)
a=根号3
原式
=a²(a²-2)/(a²-1)
=3×(3-2)/(3-1)
=3/2
(a²-2)/(a²-2a+1) ÷ (a+1)/(a³-a²)
=(a²-2)/(a-1)² × a²(a-1)/(a+1)
=(a²-2)/(a-1) × a²/(a+1)
=a²(a²-2)/(a²-1)
a=根号3
原式
=a²(a²-2)/(a²-1)
=3×(3-2)/(3-1)
=3/2