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问题: 初二分式方程

(x-4)/(x-2)+(x+5)(x+3)=(x+4)/(x+2)+(x-5)(x-3)

解答:

(x-4)/(x-2)+(x+5)(x+3)=(x+4)/(x+2)+(x-5)(x-3)
(x-4)/(x-2)-(x+4)/(x+2)=(x-5)(x-3))-(x+5)(x+3)
(x-4)/(x-2)-(x+4)/(x+2)=-16x
[(x-4)(x+2)-(x+4)(x-2)]/[(x-2)(x+2)]=-16x
(-4x)/[(x-2)(x+2)]=-16x
当x≠0:1/[(x-2)(x+2)]=4
(x-2)(x+2)=1/4
x^2-4=1/4
x^2=17/4
x=±√17/2
又x=0满足原分式方程
检验知x=0,x=±√17/2是原分式方程 的根