What is the center of a circle represented by the equation open paren x plus 9 close paren squared plus open paren y minus 6 close paren squared is equal to 10 squared ?

A circle in standard form is (x − h)² + (y − k)² = r², and its center is (h, k). Here, (x + 9)² = (x − (−9))² and the second term is (y − 6)², so the center is (−9, 6). This is choice B, negative 9 comma 6.

AI-written and checked against the verified answer.