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

[ 1/1 Equation]
    Work: Find the solution of equation -a^(2)-3a = 1 .
    Question type: Equation
    Solution:
    The solution of the equation:
        a₁≈-2.618034 , keep 6 decimal places
        a₂≈-0.381966 , keep 6 decimal places    
    There are 2 solution(s).

解程的详细方法请参阅：《方程的解法》

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