Question

Find the center and radius from the equation (x - 2)^2 + (y + 1)^2 = 16

Answer 1

Center: (2,-1)

Radius: 4

Explanation:

Circle equation: (x-h)^2 + (y-k)^2 = r^2

Finding the center:

Set to equaling 0 and solve for x and y

(x - 2)^2=0

(y + 1)^2=0

Finding the radius:

In the equation, because it's set to r^2, you would undo the square.

`√(16)`=4