Question 452810
Semi-major axis is 3--1 = a =  4.
Semi-minor axis is 3 - 1 = b = 2.

==> standard form of the equation is {{{(x-3)^2/2^2 + (y-3)^2/4^2 = 1}}}, or 

{{{(x-3)^2/4 + (y-3)^2/16 = 1}}}