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Let C1 and C2 be the centres of the circ...

Let C1 and C2 be the centres of the circle X^2+y^2 -2x-2y-2=0 and x^2 +y^2-6x-6y+14=0 resp. If P and Q are the point of intersection of these circles, then the area (in sq. units) of the quadrilateralPC1QC2 is

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