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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.
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 (0.007*x+1)*(0.00167*x+1)*(0.007*x+1)*(0.9*x+1)*x = 0 .
Question type: Equation
Solution:Original question:
| ( | 7 1000 | x | + | 1 | ) | ( | 167 100000 | x | + | 1 | ) | ( | 7 1000 | x | + | 1 | ) | ( | 9 10 | x | + | 1 | ) | x | = | 0 |
| Left side of the equation = | 7 1000 | x | ( | 167 100000 | x | + | 1 | ) | ( | 7 1000 | x | + | 1 | ) | ( | 9 10 | x | + | 1 | ) | x | + | 1 | ( | 167 100000 | x | + | 1 | ) | ( | 7 1000 | x | + | 1 | ) | ( | 9 10 | x | + | 1 | ) | x |
| = | 7 1000 | x | × | 167 100000 | x | ( | 7 1000 | x | + | 1 | ) | ( | 9 10 | x | + | 1 | ) | x | + | 7 1000 | x | × | 1 | ( | 7 1000 | x | + | 1 | ) | ( | 9 10 | x | + | 1 | ) |
| = | 1169 100000000 | x | x | ( | 7 1000 | x | + | 1 | ) | ( | 9 10 | x | + | 1 | ) | x | + | 7 1000 | x | ( | 7 1000 | x | + | 1 | ) | ( | 9 10 | x | + | 1 | ) | x | + | 1 |
| = | 1169 100000000 | x | x | × | 7 1000 | x | ( | 9 10 | x | + | 1 | ) | x | + | 1169 100000000 | x | x | × | 1 | ( | 9 10 | x | + | 1 | ) |
After the equation is converted into a general formula, there is a common factor:
( 9x + 10 )( x +0 )
From
9x + 10 = 0
x + 0 = 0
it is concluded that:：
| x1= | - | 10 9 |
| x2=0 |
Solutions that cannot be obtained by factorization:
x3≈-142.857143 , keep 6 decimal places
x4≈-142.857143 , keep 6 decimal places
There are 4 solution(s).
解程的详细方法请参阅：《方程的解法》