What is the center and radius of the circle defined by the equation ?

Answer and explanation

Correct answer: A. Center , radius 6

  1. Step 1: Compare with standard circle equation: , where center is and radius is .
  2. Step 2: Here, , , and . Therefore, center is and radius is 6.
Answer
Center , radius 6.
Why not the others: 'Center ' inverts the coordinate signs; 'radius 36' forgets to take the square root of ; 'Center ' inverts the -coordinate sign.

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