Overview: 2 questions will be solved this time.Among them
           ☆2 inequalities

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

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

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    The final solution set is :
         -2 ≤ x ≤ 3
[ 2/2Inequality]
    Assignment:Find the solution set of inequality x^2+2x-8 >0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         x ^ 2 + 2 * x - 8 >0         (1)

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    From inequality(1)：
         x < -4 或  x ＞ 2

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    The final solution set is :
         x < -4 或  x ＞ 2

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