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[ 1/1 Equation]
    Work: Find the solution of equation 2+9.81*x^3 = (5+4/25/9.81)*9.81*x^2 .
    Question type: Equation
    Solution:
    The solution of the equation:
        x₁≈-0.197739 , keep 6 decimal places
        x₂≈0.205868 , keep 6 decimal places
        x₃≈5.008182 , keep 6 decimal places    
    There are 3 solution(s).

解程的详细方法请参阅：《方程的解法》

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