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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 （x－20）（2x+80） = 150 .
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≈-41.224990 , keep 6 decimal places
x2≈21.224990 , 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 （x－20）（2x+80） = 150 .
Question type: Equation
Solution:Original question:
| ( | x | − | 20 | ) | ( | 2 | x | + | 80 | ) | = | 150 |
| Left side of the equation = | x | ( | 2 | x | + | 80 | ) | − | 20 | ( | 2 | x | + | 80 | ) |
| = | x | × | 2 | x | + | x | × | 80 | − | 20 | ( | 2 | x | + | 80 | ) |
| = | x | × | 2 | x | + | 80 | x | − | 20 | × | 2 | x | − | 20 | × | 80 |
| = | x | × | 2 | x | + | 80 | x | − | 40 | x | − | 1600 |
| = | x | × | 2 | x | + | 40 | x | − | 1600 |
| x | × | 2 | x | + | 40 | x | − | 1600 | = | 150 |
The solution of the equation:
x1≈-41.224990 , keep 6 decimal places
x2≈21.224990 , keep 6 decimal places
There are 2 solution(s).
解程的详细方法请参阅：《方程的解法》