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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality （800-2Xx）（600-2x） ≥240000 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( 800 - 2 * X * X ) * ( 600 - 2 * X ) ≥240000         (1)

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    From inequality(1)：
         -14.463712 ≤ X ≤ 13.797049

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    The final solution set is :
         -14.463712 ≤ X ≤ 13.797049

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