Mathematics
         
语言:中文    Language:English
Mathematical calculation:
    Enter the mathematical formula directly and click the "Next" button to get the calculation answer.
    It supports mathematical functions (including trigonometric functions).
    Current location:Mathematical operation > History of Mathematical Computation > Answer

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

[ 1/1 Equation]
    Work: Find the solution of equation a(a-18) = -45 .
    Question type: Equation
    Solution:Original question:
      a ( a 18) = - 45
    Remove the bracket on the left of the equation:
     Left side of the equation = a a a × 18
    The equation is transformed into :
      a a 18 a = - 45

    After the equation is converted into a general formula, it is converted into:
    ( a - 3 )( a - 15 )=0
    From
        a - 3 = 0
        a - 15 = 0

    it is concluded that::
        a1=3
        a2=15
    
    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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