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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 501.56*(-h^2-0.4h+0.76) ≤1050h^2+420h .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        501.56 * ( -h ^ 2 - 0.4 * h + 0.76 ) ≤1050 * h ^ 2 + 420 * h         (1)

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    From inequality(1)：
         h ≤ -0.734489 或  h ≥ 0.334489

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    The final solution set is :
         h ≤ -0.734489 或  h ≥ 0.334489

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