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

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

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    From inequality(1)：
         x < -20/7
    From inequality(2)：
         x ≤ -2.561553 或  x ≥ 1.561553

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    From inequalities (1) and (2)
         x < -20/7    (3)

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    The final solution set is :
         x < -20/7

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