X三次方-4X二次方+3X除X三次方+3X二次方-4X约分求解X三次方-4X二次方+3X 除 X三次方+3X二次方-4X约分求解
问题描述：
X三次方-4X二次方+3X除X三次方+3X二次方-4X约分求解
X三次方-4X二次方+3X 除 X三次方+3X二次方-4X约分求解
答
(x^3-4x^2+3x)/(x^3+3x^2-4x)
=x(x-3)(x-1)/x(x+4)(x-1)
=(x-3)/(x+4)