Posted by **Daksh** on Friday, April 25, 2014 at 1:19am.

Find the equation of the locus of the point representing z if |z-5-12i| + |z-5+21i|=13

- Locus- Calculus -
**Daksh**, Friday, April 25, 2014 at 1:49am
correction:

|z-5-12i| + |z-5+12i|=13

- Locus- Calculus -
**Steve**, Friday, April 25, 2014 at 5:53am
|z-5-12i| is the distance of z from 5+12i

|z-5+12i| is the distance of z from 5-12i

As we know, the locus of a point whose distances from two other points add to a constant, is an ellipse.

The equation of the ellipse should be no problem, since you know the foci and the sum of the distances.

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