If the standard form of a circle is 64 what is the center

The standard form of a circle is 64 ,what is the center and its radius?
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The standard form of a circle centered on (a,b) with radius = r is:

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

We need a bit more info than just 64 to make a circle.
by Level 13 User (103k points)

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