Question

Write an equation of the circle with center (-2,-9) and radius 10

Answer 1

`(x+2)^(2)` +
`(y+9)^(2)` = 100

Explanation:

Standard Equation of a Circle

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

(h,k) = center of circle

r = radius of circle

Substitute in given. Watch the negatives.