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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality （x-x^2+6）*（x^2+5x+7） ≤0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( x - x ^ 2 + 6 ) * ( x ^ 2 + 5 * x + 7 ) ≤0         (1)

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    From inequality(1)：
         x ≤ -2 或  x ≥ 3

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    The final solution set is :
         x ≤ -2 或  x ≥ 3

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