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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 4a ≥9a^2-72a-144 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        4 * a ≥9 * a ^ 2 - 72 * a - 144         (1)

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    From inequality(1)：
         -1.59389 ≤ a ≤ 10.038334

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    The final solution set is :
         -1.59389 ≤ a ≤ 10.038334

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