Overview: 1 questions will be solved this time.Among them
           ☆1 inequalities

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 2d^2+47d+210 <0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        2 * d ^ 2 + 47 * d + 210 <0         (1)

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    From inequality(1)：
         -35/2 < d < -6

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    The final solution set is :
         -35/2 < d < -6

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