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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 2（30-x）x+2（20-x）x = 200 .
Question type: Equation
Solution:Original question:
Remove the bracket on the left of the equation:
The equation is transformed into :
The solution of the equation:
x1≈2.192236 , keep 6 decimal places
x2≈22.807764 , keep 6 decimal places
There are 2 solution(s).
解程的详细方法请参阅：《方程的解法》
☆1 equations
[ 1/1 Equation]
Work: Find the solution of equation 2（30-x）x+2（20-x）x = 200 .
Question type: Equation
Solution:Original question:
| 2 | ( | 30 | − | x | ) | x | + | 2 | ( | 20 | − | x | ) | x | = | 200 |
| Left side of the equation = | 2 | × | 30 | x | − | 2 | x | x | + | 2 | ( | 20 | − | x | ) | x |
| = | 60 | x | − | 2 | x | x | + | 2 | ( | 20 | − | x | ) | x |
| = | 60 | x | − | 2 | x | x | + | 2 | × | 20 | x | − | 2 | x | x |
| = | 60 | x | − | 2 | x | x | + | 40 | x | − | 2 | x | x |
| = | 100 | x | − | 2 | x | x | − | 2 | x | x |
| 100 | x | − | 2 | x | x | − | 2 | x | x | = | 200 |
The solution of the equation:
x1≈2.192236 , keep 6 decimal places
x2≈22.807764 , keep 6 decimal places
There are 2 solution(s).
解程的详细方法请参阅：《方程的解法》