1. Determine the restrictions on the constants A, C and D so that Ax^2+Cy^2+Dx+Ey+F=0 represents a parabola that opens to the left.(adsbygoogle = window.adsbygoogle || []).push({});

I know that A=0, how do u know if CD>0 or CD<0..........??

2. The equation Ax^2+By^2+Cy=0 represents an ellipse. If 0<A<B<C, then the vertices of the ellipse are on

a line parallel to the y-axis or a line parallel to the x-axis????

3. Determine the restrictions on the constants, A, C and E such that the following equation is a parbola with a vertical axis of symmetry. Ax^2+Cy^2+x+Ey=0

i know that A can't =0 and C=0...

how can u tell if E=0 or not....???

Thanks.

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# When does Ax2 + Cy^2 + Dx + Ey + F = 0 represent a parabola

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