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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 4x^2+21x+84x+441 <21+11x .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        4 * x ^ 2 + 21 * x + 84 * x + 441 <21 + 11 * x         (1)

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    From inequality(1)：
         -35/2 < x < -6

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    The final solution set is :
         -35/2 < x < -6

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