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

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

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    From inequality(1)：
         x ≤ 0 或  x ≥ 4

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    The final solution set is :
         x ≤ 0 或  x ≥ 4

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