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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 0.30x^2-0.60x+1 ≤0.9 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        0.30 * x ^ 2 - 0.60 * x + 1 ≤0.9         (1)

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    From inequality(1)：
         0.183503 ≤ x ≤ 1.816497

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    The final solution set is :
         0.183503 ≤ x ≤ 1.816497

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