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[ 1/1 Equation]
    Work: Find the solution of equation (x^2-1)(x-1)(x^2-x-2) = 0 .
    Question type: Equation
    Solution:
    After the equation is converted into a general formula, it is converted into:
    ( x + 1 )( x + 1 )( x - 1 )( x - 1 )( x - 2 )=0
    From
        x + 1 = 0
        x + 1 = 0
        x - 1 = 0
        x - 1 = 0
        x - 2 = 0
    it is concluded that:：
        x₁=-1
        x₂=-1
        x₃=1
        x₄=1
        x₅=2    
    There are 5 solution(s).

解程的详细方法请参阅：《方程的解法》

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