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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 140t＾2＋60t－77 >0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        140 * t ^ 2 + 60 * t - 77 >0         (1)

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    From inequality(1)：
         t < -0.986243 或  t ＞ 0.557672

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    The final solution set is :
         t < -0.986243 或  t ＞ 0.557672

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