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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality sqrt(5-4*x-x^2) ≥x .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         sqrt ( 5 - 4 * x - x ^ 2 ) ≥ x         (1)
        From the definition field of √
         5 - 4 * x - x ^ 2 ≥ 0        (2 )

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    From inequality(1)：
         x ≤ 0.870829
    From inequality(2)：
         -5 ≤ x ≤ 1

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    From inequalities (1) and (2)
         -5 ≤ x ≤ 0.870829    (3)

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    The final solution set is :
         -5 ≤ x ≤ 0.870829

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