Problem Solving (PS) | A circle has a center at P = (–4, 4) and passes through the point (2,

I didn't catch shortcut y = -x, which IS elegant. I'm not a fan of the distance formula.

Start with general formula for a circle:

\((x - h)^2 + (y - k)^2 = r^2\) Plug in center coordinates:

\((x + 4)^2 + (y - 4)^2 = r^2\) Any point through
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