Question

9x2 + 25y2 = 225
The foci are at points (- , ), ( , )

Answer 1

this is an ellipse
if i remember correctly the foci given

+-sqrt(25 - 9) = +-4 - thats x corodinates

Answer 2

can you explain it a little more...this is really confusing :(

Answer 3

i'll have to check it out

Answer 4

okay

Answer 5

here are some notes on it:
http://www.mathwarehouse.com/ellipse/focus-of-ellipse.php

(-4,0) and (4,0) are correct

Answer 6

okay thanks