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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality -a-5 ≤sqrt(a^2+6a+1) .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        -a - 5 ≤ sqrt ( a ^ 2 + 6 * a + 1 )         (1)
        From the definition field of √
         x ^ 2 + 6 * x + 1 ≥ 0        (2 )

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    From inequality(1)：
         a ≤ -6
    From inequality(2)：
         a ≤ -5.828427 或  a ≥ -0.171573

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    From inequalities (1) and (2)
         a ≤ -6    (3)

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    The final solution set is :
         a ≤ -6

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