Overview: 3 questions will be solved this time.Among them
           ☆3 equations

[ 1/3 Equation]
    Work: Find the solution of equation -x²+2x+8 = 0 .
    Question type: Equation
    Solution:
    After the equation is converted into a general formula, it is converted into:
    ( x + 2 )( x - 4 )=0
    From
        x + 2 = 0
        x - 4 = 0
    it is concluded that:：
        x₁=-2
        x₂=4    
    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》
[ 2/3 Equation]
    Work: Find the solution of equation 2x²+x-6 = 0 .
    Question type: Equation
    Solution:
    After the equation is converted into a general formula, it is converted into:
    ( x + 2 )( 2x - 3 )=0
    From
        x + 2 = 0
        2x - 3 = 0
    it is concluded that:：
        x₁=-2

x2=

3 2

    
    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》
[ 3/3 Equation]
    Work: Find the solution of equation 3y²-8y-3 = 0 .
    Question type: Equation
    Solution:
    After the equation is converted into a general formula, it is converted into:
    ( 3y + 1 )( y - 3 )=0
    From
        3y + 1 = 0
        y - 3 = 0
    it is concluded that:：

y1=

-

1 3

y2=3

    
    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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