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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality (1-a)²-4(a²-2a) ≤0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( 1 - a ) ^ 2 - 4 * ( a ^ 2 - 2 * a ) ≤0         (1)

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    From inequality(1)：
         a ≤ -0.154701 或  a ≥ 2.154701

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    The final solution set is :
         a ≤ -0.154701 或  a ≥ 2.154701

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