# How do you find the a, b, c for #(x + 3)^2/9 + (y – 9)^2/25 =1#?

##### 1 Answer

Oct 22, 2015

#### Answer:

Find them by a bit of rewriting of the equation and using the formula that

#### Explanation:

First, rewrite the equation of this ellipse in the form

Hence

Therefore, the distance between the center of the ellipse and the two foci is

FYI, the center of the ellipse is the point whose rectangular coordinates are