SOLUTION: "Graph the equation, then choose the correct coordinates of the foci. y^2= 5x^2+25." I graphed it but for some reason I keep getting the wrong answer for the foci. I could use so

Algebra ->  Quadratic-relations-and-conic-sections -> SOLUTION: "Graph the equation, then choose the correct coordinates of the foci. y^2= 5x^2+25." I graphed it but for some reason I keep getting the wrong answer for the foci. I could use so      Log On


   

Question 42622: "Graph the equation, then choose the correct coordinates of the foci.
y^2= 5x^2+25." I graphed it but for some reason I keep getting the wrong answer for the foci. I could use some help! Thanx!
Answer by Nate(3500) About Me  (Show Source):
You can put this solution on YOUR website!

y^2 = 5x^2 + 25
y^2 - 5x^2 = 25
y^2/25 - x^2/5 = 1
a = 5
b = sqrt%285%29
a%5E2+%2B+b%5E2+=+c%5E2
25+%2B+5+=+c%5E2
30+=+c%5E2
sqrt%2830%29+=+c
(0,sqrt%2830%29) and (0,-sqrt%2830%29)