计算x-3/x²+x除以(x²-6x+9)

问题描述:

计算x-3/x²+x除以(x²-6x+9)

x-3/x²+x除以(x²-6x+9)
=[x-3/x(x+1)]*[1/(x-3)²]
=1/[x(x²-2x-3)]
1/(x³-2x²-3x)