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

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

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    From inequality(1)：
         x ≤ -12/5 或  x ≥ 0

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    The final solution set is :
         x ≤ -12/5 或  x ≥ 0
[ 2/2Inequality]
    Assignment:Find the solution set of inequality (x-3)/x >0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( x - 3 ) / x >0         (1)
        From the definition field of divisor
        x ≠ 0        (2 )

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    From inequality(1)：
         x < 0 或  x ＞ 3
    From inequality(2)：
         x < 0 或  x ＞ 0

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    From inequalities (1) and (2)
         x < 0 或  x ＞ 3    (3)

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    The final solution set is :
         x < 0 或  x ＞ 3

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