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Miscellaneous
Example: Equation of a circumference
Reading time: 1minConsider the following question:
with correct answer:
Then, the following answers will be accepted or rejected according to the table below:
| Student answer | Validation |
| (x-1)²+(y-2)²=9 |  |
| x²-2x+1+y²-4y+4=9 | |
| x²+y²-2x-4y+5=9 | |
| x²+y²-2x-4y=4 |  |
| x²+y²-2x-4y-4=0 | |