# Equation of triangle and solution of Bisector?

Geometry Level 4

A $$\triangle$$ $$PQR$$ has vertices $$P =(-8,5), Q =(-15,-19)$$, and $$R =(1,-7)$$ . The equation of the bisector of $$\angle P$$ can be written in the form $$ax+2y+c=0$$ . Find $$a+c$$..

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