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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 x2-6x+9 = 0 .
Question type: Equation
Solution:Original question:
| x | × | 2 | − | 6 | x | + | 9 | = | 0 |
| Left side of the equation = | - | 4 | x | + | 9 |
| - | 4 | x | + | 9 | = | 0 |
Transposition :
| - | 4 | x | = | 0 | − | 9 |
Combine the items on the right of the equation:
| - | 4 | x | = | - | 9 |
By shifting the terms and changing the symbols on toth sides of the equation, we obtain :
| 9 | = | 4 | x |
If the left side of the equation is equal to the right side, then the right side must also be equal to the left side, that is :
| 4 | x | = | 9 |
The coefficient of the unknown number is reduced to 1 :
| x | = | 9 | ÷ | 4 |
| = | 9 | × | 1 4 |
We obtained :
| x | = | 9 4 |
Convert the result to decimal form :
| x | = | 2.25 |