Question

Find the major axis for the ellipse with the given equation.
x^2 + 16y^2 - 96y + 128 = 0

A)8
B)16

Answer 1

x=4

Answer 2

My teacher said it wasn't 4 though

Answer 3

Then I don't know... I was using mathway..

Answer 4

Oh ok thanks anyway

Answer 5

try taking it this way:

\(x^2 + 16y^2 - 96y + 128 = 0\)

\(x^2 + 16(y^2 - 6y) + 128 = 0\)

\(x^2 + 16[(y- 3)^2 -9] + 128 = 0\)

etc etc ......until you have it in the standard form, which here is:

\( \displaystyle{\left(\frac{x}{a}\right)^2 + \left(\frac{y - y_o}{b}\right)^2} = 1\)

there's no point asking computers to do it for you :p