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

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

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    From inequality(1)：
         a < -1.302776 或  a ＞ 2.302776

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    The final solution set is :
         a < -1.302776 或  a ＞ 2.302776

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