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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 3A*A+16A+20 ≥0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        3 * A * A + 16 * A + 20 ≥0         (1)

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    From inequality(1)：
         A ≤ -10/3 或  A ≥ -2

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    The final solution set is :
         A ≤ -10/3 或  A ≥ -2

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