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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 (-2x+220)(x-40) = 0 .
Question type: Equation
Solution:Original question:
Remove the bracket on the left of the equation:
The equation is transformed into :
After the equation is converted into a general formula, it is converted into:
( x - 40 )( x - 110 )=0
From
x - 40 = 0
x - 110 = 0
it is concluded that:：
x1=40
x2=110
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》
☆1 equations
[ 1/1 Equation]
Work: Find the solution of equation (-2x+220)(x-40) = 0 .
Question type: Equation
Solution:Original question:
| ( | - | 2 | x | + | 220 | ) | ( | x | − | 40 | ) | = | 0 |
| Left side of the equation = | - | 2 | x | ( | x | − | 40 | ) | + | 220 | ( | x | − | 40 | ) |
| = | - | 2 | x | x | + | 2 | x | × | 40 | + | 220 | ( | x | − | 40 | ) |
| = | - | 2 | x | x | + | 80 | x | + | 220 | ( | x | − | 40 | ) |
| = | - | 2 | x | x | + | 80 | x | + | 220 | x | − | 220 | × | 40 |
| = | - | 2 | x | x | + | 80 | x | + | 220 | x | − | 8800 |
| = | - | 2 | x | x | + | 300 | x | − | 8800 |
| - | 2 | x | x | + | 300 | x | − | 8800 | = | 0 |
After the equation is converted into a general formula, it is converted into:
( x - 40 )( x - 110 )=0
From
x - 40 = 0
x - 110 = 0
it is concluded that:：
x1=40
x2=110
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》