Question

If the equation of a circle is (x + 5)2 + (y - 7)2 = 36, its center point is

A(5.7)
B(-5,7)
C(5-7)

Answer 1

B

Explanation:

The equation of a circle in standard form is

(x - h)² + (y - k)² = r²

where (h, k) are the coordinates of the centre and r is the radius

(x + 5)² + (y - 7)² = 36 ← is in standard form

with (h, k ) = (- 5, 7 ) → B