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Let PQ be the common chord of the circle...

Let PQ be the common chord of the circles `S_(1):x^(2)+y^(2)+2x+3y+1=0` and `S_(2):x^(2)+y^(2)+4x+3y+2=0`, then the perimeter (in units) of the triangle `C_(1)PQ` is equal to
`("where, "C_(1)=(-1, (-3)/(2)))`

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