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 (30-2x)×(20-x) = 78×6 .
    Question type: Equation
    Solution:Original question:
     (302 x )(20 x ) = 78 × 6
    Remove the bracket on the left of the equation:
     Left side of the equation = 30(20 x )2 x (20 x )
                                             = 30 × 2030 x 2 x (20 x )
                                             = 60030 x 2 x (20 x )
                                             = 60030 x 2 x × 20 + 2 x x
                                             = 60030 x 40 x + 2 x x
                                             = 60070 x + 2 x x
    The equation is transformed into :
     60070 x + 2 x x = 78 × 6
     Right side of the equation = 468
    The equation is transformed into :
     60070 x + 2 x x = 468

    After the equation is converted into a general formula, it is converted into:
    ( x - 2 )( x - 33 )=0
    From
        x - 2 = 0
        x - 33 = 0

    it is concluded that::
        x1=2
        x2=33
    
    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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