(x-2分之x-x+2分之x)除以2-x分之4x

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(x-2分之x-x+2分之x)除以2-x分之4x

(x-2分之x-x+2分之x)除以2-x分之4x
(x-2分之x-x+2分之x)除以2-x分之4x

(x-2分之x-x+2分之x)除以2-x分之4x
(x-2分之x-x+2分之x)÷2-x分之4x
=[(x/(x-2)-x/(x+2)]÷4x/(2-x)
=[(x²+2x-x²+2x)/(x-2)(x+2)]*(2-x)/4x
=4x/(x-2)(x+2)*(2x-)/4x
=-1/(x+2)