2-x分之x-x²-4x+4分之4-x²

问题描述:

2-x分之x-x²-4x+4分之4-x²

2-x分之x-x²-4x+4分之4-x²
=-x/(x-2)+(x²-4)/(x²-4x+4)
=-x/(x-2)+(x+2)(x-2)/(x-2)²
=-x/(x-2)+(x+2)/(x-2)
=2/(x-2)