Question

@Mertsj Graph the Ellipse and locate the foci
x^2/25+y^2/64=1

Answer 1

We got the graph we just need the foci

Answer 2

a^2-b^2=c^2

Answer 3

Find c because the foci are c units to the right and c units to the left of the center.

Answer 4

sqrt 39?

Answer 5

yes. And I just noticed that the major axis is vertical so the foci are c units above and c units below the center.

Answer 6

So the foci are:
\[(0,\pm \sqrt{39})\]

Answer 7

he got that

Answer 8

Try drawing a picture if you can. Try that first and see if you can "see" the solution and then move on the the algebra.

Answer 9

He was right.

Answer 10

Tell him "good job"

Answer 11

question is comleted