Mathematics
         
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On line Solution of Monovariate Equation:
    Input any unary equation directly, and then click the "Next" button to obtain the solution of the equation.
    It supports equations that contain mathematical functions.
    Current location:Equations > Monovariate Equation > The history of univariate equation calculation > Answer

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

[ 1/1 Equation]
    Work: Find the solution of equation (40-x)*(20+2x) = 1200 .
    Question type: Equation
    Solution:Original question:
     (40 x )(20 + 2 x ) = 1200
    Remove the bracket on the left of the equation:
     Left side of the equation = 40(20 + 2 x ) x (20 + 2 x )
                                             = 40 × 20 + 40 × 2 x x (20 + 2 x )
                                             = 800 + 80 x x (20 + 2 x )
                                             = 800 + 80 x x × 20 x × 2 x
                                             = 800 + 60 x x × 2 x
    The equation is transformed into :
     800 + 60 x x × 2 x = 1200

    After the equation is converted into a general formula, it is converted into:
    ( x - 10 )( x - 20 )=0
    From
        x - 10 = 0
        x - 20 = 0

    it is concluded that::
        x1=10
        x2=20
    
    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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