I have this question on ellipse

Question

anonymous · Answer

attachment

anonymous · Answer

Number 3

anonymous · Answer

anonymous · Answer

I got center (0,0) and a=+- 2, like the asker, but why they the person that answered out a^2=4^2, shouldnt it have been 2^2, since a==-2

amistre64 · Answer

this is a rotated ellipse using a more generalized from of the conic equations

anonymous · Answer

hmm, so i would have to find the generalized conic equation

amistre64 · Answer

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amistre64 · Answer

Ax2 + Bxy + Cy2 + Dx + Ey + F = 0

anonymous · Answer

i see what you mean amistre, but i have never had a question where i has to come up with the general equation, how would i do that

amistre64 · Answer

I wish I was more apt to answer that :)  but I dont play with this enough to have a firm grasp of it

amistre64 · Answer

I can unrotate it so that its equivalent is a normal looking ellipse

anonymous · Answer

now can you shed some light on what the guy on yahoo answered, cause it look like he came up with the standard equation of the eliipse

amistre64 · Answer

but the actual equation for the ellipse would invlove the rotation itself

amistre64 · Answer

i cant say how he got to his solution; or even if its correct.

amistre64 · Answer

but lets try to unravel this; we want to know the distance from the center of the ellipse to a focal point

amistre64 · Answer

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