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OpenStudy (anonymous):
x^2+y^2+4x+2y-20=0 Need to find center, radius, and intercepts of circle.
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OpenStudy (precal):
complete the square to find the center
OpenStudy (anonymous):
Its a circle... I have the center (-2,1) and radius 5
OpenStudy (precal):
|dw:1340671669497:dw| multiply it out and see if your answers match
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