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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 0.81x*x+62x ≤1900 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        0.81 * x * x + 62 * x ≤1900         (1)

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    From inequality(1)：
         -100 ≤ x ≤ 23.45679

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    The final solution set is :
         -100 ≤ x ≤ 23.45679

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