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

[ 1/1 Equation]
    Work: Find the solution of equation x^2+63x = -882 .
    Question type: Equation
    Solution:
    After the equation is converted into a general formula, it is converted into:
    ( x + 42 )( x + 21 )=0
    From
        x + 42 = 0
        x + 21 = 0
    it is concluded that:：
        x₁=-42
        x₂=-21    
    There are 2 solution(s).

解一元二次方程的详细方法请参阅：《一元二次方程的解法》

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