Question

What’s the circle equation for this ? Calculus

Answer 1

Greetings from Brasil...

The expression that allows using the equation of a circle is:

(X - Xc)² + (Y - Yc)² = R²

as

Xc = - 4, Yc = 4 and R = 4, then

(X + 4)² + (Y - 4)² = 16

or

X² + 8X + Y² - 8Y + 16 = 0