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打卡作业,互相学习

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明明love0

#1 Created at ... [Delete] [Delete and Lock User]

double da = Math.pow(b,2) - 4*a*c;

        double dia = Math.sqrt(da);

        r1 = (-b + dia) / (2*a);

        r2 = (-b - dia) / (2*a);


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