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

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

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

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

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

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    The final solution set is :
         -3 < x < -2

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