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Points $A,$ $B,$ and $C$ are given in the coordinate plane. There exists a point $Q$ and a constant $k$ such that for any point $P$,
PA^2 + PB^2 + PC^2 = 3PQ^2 + k.
If $A = (7,-11),$ $B = (10,13),$ and $C = (18,-22)$, then find the constant k.

 Jul 11, 2024
 #3
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the constant of the equation, k is equal to \(\frac{2116}{3}\)

 Jul 11, 2024

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