(x²-x+1)/x=5
x-1+1/x=5
x+1/x=6
那么
(x^4+x²+1)/x²
=x²+1+1/x²
=(x+1/x)²-1
=6²-1
=36-1
=35
如仍有疑惑,欢迎追问.祝：