Question

Which of the following is the equation of the circle with center (2, -1) and r = 8?


a. (x - 2)2 + (y + 1)2 = 64
b.(x - 2)2 + (y + 1)2 = 8
c.(x + 2)2 + (y - 1)2 = 64
d.(x + 2)2 + (y - 1)2 = 8

Answer 1

A circle with center (h, k) and center r has equation

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

Use the equation above and enter your problem's center and radius.
What do you get?

Answer 2

@thehouseisaround were you able to accomplish the answer yet?

Answer 3

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

h = 2, k = -1, and r = 8

( x - (2) ) ^2 + ( y - ( -1 ) ) ^2 = 8^2

(x -2) ^2 + ( y + 1 ) ^2 = 64

Answer 4

No @Sila1453 that is wrong. you should keep the exponent in the radius. like 8^2 never simplify