Question

A circle has its center at (-1, 2) and a radius of 3 units. What is the equation of the circle?

(x - 1)2 + (y + 2)2 = 3

(x + 1)2 + (y - 2)2 = 3

(x + 1)2 + (y + 2)2 = 9

(x + 1)2 + (y - 2)2 = 9

Answer 1

they general form is

\[(x -h)^2 + (y - k)^2 = r^2\]

where (h, k) is the centre and r is the radius...

you have

h = -1, k = 2 and r = 3

so substitute and simplify the radius...

hope it helps

Answer 2

thank you so much