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

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

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

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    The final solution set is :
         -2 ≤ x ≤ -1/2
[ 2/2Inequality]
    Assignment:Find the solution set of inequality -2     Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
        -2 < x         (1)
         x < -1 / 2         (2)

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    From inequality(1)：
         x ＞ -2
    From inequality(2)：
         x < -1/2

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

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    The final solution set is :
         -2 < x < -1/2

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