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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality x*x-4x-12 <= 0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         x * x - 4 * x - 12 <= 0         (1)

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    From inequality(1)：
         -2 ≤ x ≤ 6

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    The final solution set is :
         -2 ≤ x ≤ 6

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