作业帮(13x-x^2)/(x+1)[x+(13-x)/(x+1)]=42
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/13 03:53:55
![(13x-x^2)/(x+1)[x+(13-x)/(x+1)]=42](/uploads/image/z/186027-51-7.jpg?t=%2813x-x%5E2%29%2F%28x%2B1%29%5Bx%2B%2813-x%29%2F%28x%2B1%29%5D%3D42)
(13x-x^2)/(x+1)[x+(13-x)/(x+1)]=42
(13x-x^2)/(x+1)[x+(13-x)/(x+1)]=42
(13x-x^2)/(x+1)[x+(13-x)/(x+1)]=42
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