Question 971572
{{{a^2=12}}} and {{{b^2=9}}}; and there is a number c, the distance from center to either focus.  Studying the derivation of equation for an ellipse, a relationship {{{b^2=a^2-c^2}}} occurs.


Your center point (h,k) should be apparent directly from your given equation.  YES!  The origin is the center.


Now, compute the value for c.  Use it to find the foci.
{{{9=12-c^2}}}
{{{9-12=-c^2}}}
{{{12-9=c^2}}}
{{{c^2=3}}}
{{{c=0+- sqrt(3)}}}