Overview: 2 questions will be solved this time.Among them
           ☆1 inequalities
           ☆1 calculations of prime factor

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

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    From inequality(1)：
         -√3 < a < √3

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    The final solution set is :
         -√3 < a < √3
[2/2 Digtal analysis]
    Work：Break 4 into prime factors.
    Question type: Resolving prime factor
    Solution:
        4=2*2
    *Note: 4 has 2 prime factors.

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