samantha59223 samantha59223

03-06-2019
Mathematics

contestada

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

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MathPhys MathPhys

03-06-2019

Answer:

(-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.

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