How do you write an equation of a circle with center (-2, 1), radius = 4?

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How do you write the general form given a circle that passes through the given points. P(-2, 0),...
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Answer 1 · 2018-03-03T14:29:10

$(x+2)^2+(y-1)^2=16$

The standard equation of a circle with center $(a,b)$ and radius $r$ is given by

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

Then, given your problem,

$[x-(-2)]^2+(y-1)^2=4^2$