回答以上的题,

问题描述:

回答以上的题,
(1/x-5)-(6/x^2-25)-(x+1/10+2x)

2(x+5)/2(x+5)(x-5)-12/2(x+5)(x-5)-(x+1)(x-5)/2(x+5)(x-5)
=(2x+10-12-x^2+4x+5))/2(x+5)(x-5)
=(-x^2+6x+3)/2(x+5)(x-5)