Question

Help! Find the vertices and foci of the ellipse.
25x2 + 81y2 = 81

Answer 1

\[25x^2 + 81y^2 = 81\]

Answer 2

might wanna start out by making it =1

Answer 3

so it would be \[\frac{ 25 }{ 81 } x^2 +y^2 = 1 ?\]

Answer 4

ya now u compare it with d std. form

Answer 5

would a^2 = 81? and b^2 = 1?

Answer 6

yup

Answer 7

Thank you!

Answer 8

so a = 9
b=1
c= sqrt(80)
how do i find the vertices? (x,9) and (x,-9) ? what is x? same with the x in the foci? would it be 25?

Answer 9

u can now find foci and do vertices mean the extreme point on major and minor axis???