当X为何值时,代数式（2X+9）/（X+3）-1/（X-3）-2/X的值等于2
问题描述：
当X为何值时,代数式（2X+9）/（X+3）-1/（X-3）-2/X的值等于2
答
(2x+9)/(x+3)-1/(x-3)-2/x=2 (2x+6+3)/(x+3)-1/(x-3)-2/x=2 2+3/(x+3)-1/(x-3)-2/x=2 3/(x+3)-1/(x-3)-2/x=0 3/(x+3)=1/(x-3)+2/x 3/(x+3)=[x+2(x-3)]/[x(x-3)] 3/(x+3)=(3x-6)/[x(x-3)] 1/(x+3)=(x-2)/[x(x-3)] (x+...