1,(x+ 2-x-2分之5)除以(x-2分之x-3)
=(x+ 2- x-2分之5)*(x-2)/(x-3)
=((x+2)(x-2)-5)/(x-3)
=(x^2-4-5)/(x-3)
=(x^2-9)/(x-3)
=(x+3)(x-3)/(x-3)
=x+3
2,x分之3-x-1分之4=x-x的平方分之6
3(x-1)-4x=6
3x-3-4x=6
x=-9
3,化简求值 （1+1-2x+x的平方分之x
=1+x/(x-1)^2
题目不全,请补充.