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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality x^2*[150+0.3*(x-3)*18+1.6*1.3*18-36]-2400 >0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         x ^ 2 * ( 150 + 0.3 * ( x - 3 ) * 18 + 1.6 * 1.3 * 18 - 36 ) - 2400 >0         (1)

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    From inequality(1)：
         -24.29123 < x < -4.670595 或  x ＞ 3.917381

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    The final solution set is :
         -24.29123 < x < -4.670595 或  x ＞ 3.917381

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