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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 （4—2x）（30—2x） = 600 .
Question type: Equation
Solution:Original question:
| ( | 4 | − | 2 | x | ) | ( | 30 | − | 2 | x | ) | = | 600 |
| Left side of the equation = | 4 | ( | 30 | − | 2 | x | ) | − | 2 | x | ( | 30 | − | 2 | x | ) |
| = | 4 | × | 30 | − | 4 | × | 2 | x | − | 2 | x | ( | 30 | − | 2 | x | ) |
| = | 120 | − | 8 | x | − | 2 | x | ( | 30 | − | 2 | x | ) |
| = | 120 | − | 8 | x | − | 2 | x | × | 30 | + | 2 | x | × | 2 | x |
| = | 120 | − | 8 | x | − | 60 | x | + | 4 | x | x |
| = | 120 | − | 68 | x | + | 4 | x | x |
| 120 | − | 68 | x | + | 4 | x | x | = | 600 |
The solution of the equation:
x1≈-5.365425 , keep 6 decimal places
x2≈22.365425 , keep 6 decimal places
There are 2 solution(s).
解程的详细方法请参阅：《方程的解法》