Mark P and Q on an Argand diagram, find the complex numbers R and S such PQR and PQS are equilateral Triangles?

I found P and Q by finding the square roots of 5-12i, i then have to plot the points P and Q on an Argand Diagram and find the complex numbers represented by R and S such that PQR and PQS are equilateral triangles.

Im not sure what to do, all ive done is found the magnitude of PQ, i kind of have an idea of what to do, which but not sure how to do it.

P=-3+2i
Q=3-2i

Any tips of help would be appriciated,