a/5=(a^2-ab)/(a-1)
5(a²-ab)=a(a-1)
5a²-5ab=a²-a
4a²-5ab+a=0
a(4a-5b+1)=0
4a-5b+1=0
4a=5b-1
a=(5b-1)/4
当ab满足条件(a=(5b-1)/4)时a/5=(a^2-ab)/(a-1)
祝学习进步,望采纳.
不懂得欢迎追问.
a/5=(a^2-ab)/(a-1)
5(a²-ab)=a(a-1)
5a²-5ab=a²-a
4a²-5ab+a=0
a(4a-5b+1)=0
4a-5b+1=0
4a=5b-1
a=(5b-1)/4
当ab满足条件(a=(5b-1)/4)时a/5=(a^2-ab)/(a-1)
祝学习进步,望采纳.
不懂得欢迎追问.