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Circle Equations - SAT

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This video is for the redesigned SAT which is for you if you are taking the SAT in March 2016 and beyond.

How to find the diameter of a circle given the equation in the xy-plane?

Circle Equations - SAT

x2 + y2 - 6x + 8y = 144

The equation of a circle in the xy-plane is shown above. What is the diameter of the circle?
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