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24.07.2021 •
Mathematics
HELP x^2+y^2+4x-2y=-1
The equation of a circle in the xy-plane is shown above. What is the radius of the circle
A.2
B.3
C.4
D.9
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Ответ:
A.2
Because radius is 2 and center is (-2,1)
Ответ: