Mathematics - Point Question with Solution | TestHub

Perpendicular bisector of $PR$ is $2x-y+2=0$ 

Midpoint of $PQ$ is $M\left(1,1\right)$

Equation of perpendicular bisector of $PQ$ is $y=x$.

Point of intersection of equations $PR$ and $PQ$ is circumcentre.

So, circumcentre is $\left(-2,-2\right)$