x-2分之x-1除以x^2-4分之x^2-2x+1

问题描述:

x-2分之x-1除以x^2-4分之x^2-2x+1

原式=(x-1)/(x-2)÷(x-1)²/(x+2)(x-2)
=(x-1)/(x-2)*(x+2)(x-2)/(x-1)²
=(x+2)/(x-1)