Question

I am bit of confused from this question. I have shown the work below and to subtract, am I supposed to be X2 - X1, Y2-Y1, Z2-Z1? or X1-X2, Y1-Y2, Z1-Z2?
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A triangle has sides formed by the vectors PA=(2,7,3) and PB=(6,2,2). The point P=(1,3,2). Determine the coordinates of the vertices.

Here is what I have done.

PA-P=(2,7,3)-(1,3,2)
=(-1,-4,-1)

PB-P=(6,2,2) - (1,3,2)
=(-5,1,0)