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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 1 <(x+3)(x+5) <3 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
        1 < ( x + 3 ) * ( x + 5 )         (1)
         ( x + 3 ) * ( x + 5 ) <3         (2)

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    From inequality(1)：
         x < -5.414214 或  x ＞ -2.585786
    From inequality(2)：
         -6 < x < -2

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    From inequalities (1) and (2)
         -6 < x < -5.414214 或  -2.585786 < x < -2     (3)

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    The final solution set is :
         -6 < x < -5.414214 或  -2.585786 < x < -2

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