Question

what are the foci of the ellipse given by the equation 25x^2+16y=400

Answer 1

can u write the general form of the ellipse from this equation?

Answer 2

(x-h)^2/a^2+(y+k)^2/b^2?

Answer 3

yup!

Answer 4

dont forget the = 1!!!!!!

Answer 5

I dont know what to plug in though :( h, a, k b?

Answer 6

do one thing:: divide both the sides of the equation by 400.
and tell me the equation that you get!

Answer 7

well 400/25=16 and 400/16 .. is 25. What do I do with these numbers?

Answer 8

so 16=a^2 and b^2=25

Answer 9

(25-?)/16+(16+?)/25=1?

Answer 10

no no!!!