x的2次方-5x+6分之2x-5-x-3分之1

问题描述:

x的2次方-5x+6分之2x-5-x-3分之1

=(2x-5)/(x-2)(x-3)-(x-2)/(x-3)(x-2)
=[(2x-5)-(x-2)]/(x-3)(x-2)
=(x-3)/(x-2)(x-3)
=1/(x-3)