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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality (b-3)^2-4*9*1 >0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( b - 3 ) ^ 2 - 4 * 9 * 1 >0         (1)

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    From inequality(1)：
         b < -3 或  b ＞ 9

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    The final solution set is :
         b < -3 或  b ＞ 9

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