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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality -3x^2+60x+80 ≥330 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        -3 * x ^ 2 + 60 * x + 80 ≥330         (1)

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    From inequality(1)：
         5.917517 ≤ x ≤ 14.082483

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    The final solution set is :
         5.917517 ≤ x ≤ 14.082483

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