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,(X-2-X+2分之5)/ 2x+4分之x-3 =[(x-2)(x+2)-5]/(x+2)×2(x+2)/(x-3) =(x²;-9)/(x+2)×2(x+2)/(x-3) =(x+3)(x-3)/(x+2)×2(x+2)/(x-3) =2(x+3) =2x+6
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