The equation of a circle is x^2+y^2+6x-2y-15=0. find the center and radius of the circle.

(-3, 1), 5

Step-by-step explanation:

x² + y² + 6x - 2y - 15 = 0

Rearrange:

x² + 6x + y² - 2y = 15

Complete the square:

x² + 6x + 9 + y² - 2y + 1 = 15 + 9 + 1

(x + 3) ² + (y - 1) ² = 25

Therefore, the center is (-3, 1) and the radius is 5.