What is the equation of the circle with a center at $(4 ,-7 )$ and a radius of $4$ ?

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Answer 1 · 2016-03-02T08:04:40

$(x-4)^2 + (y+7)^2 = 16$

For a circle with radius $r$ centered at $(a,b)$ , its cartesian equation is

$(x-a)^2+(y-b)^2 = r^2$

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What is the equation of the circle with a center at (4 ,-7 )(4 ,-7 ) and a radius of 4 4 ?