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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality X^2+3X-4 <= 0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         X ^ 2 + 3 * X - 4 <= 0         (1)

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    From inequality(1)：
         -4 ≤ X ≤ 1

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    The final solution set is :
         -4 ≤ X ≤ 1

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