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 (40-30+x)(80+2x) = 1200 .
    Question type: Equation
    Solution:Original question:
     (4030 + x )(80 + 2 x ) = 1200
    Remove the bracket on the left of the equation:
     Left side of the equation = 40(80 + 2 x )30(80 + 2 x ) + x (80 + 2 x )
                                             = 40 × 80 + 40 × 2 x 30(80 + 2 x ) + x (80 + 2 x )
                                             = 3200 + 80 x 30(80 + 2 x ) + x (80 + 2 x )
                                             = 3200 + 80 x 30 × 8030 × 2 x + x (80 + 2 x )
                                             = 3200 + 80 x 240060 x + x (80 + 2 x )
                                             = 800 + 20 x + x (80 + 2 x )
                                             = 800 + 20 x + x × 80 + x × 2 x
                                             = 800 + 100 x + x × 2 x
    The equation is transformed into :
     800 + 100 x + x × 2 x = 1200

    The solution of the equation:
        x1≈-53.722813 , keep 6 decimal places
        x2≈3.722813 , keep 6 decimal places
    
    There are 2 solution(s).


解程的详细方法请参阅:《方程的解法》



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