## anonymous one year ago Find the major axis for the ellipse with the given equation. x^2 + 16y^2 - 96y + 128 = 0 A)8 B)16

1. anonymous

x=4

2. anonymous

3. anonymous

My teacher said it wasn't 4 though

4. anonymous

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

5. anonymous

Oh ok thanks anyway

6. IrishBoy123

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