5 Find the equation of circle cutting orthogonally the circles x2 + y2 - 4x + 2y - 11 = 0, x + y2 + 6x - 4y - 13 - O and which has centre on the line 2x+y+4= 0.
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4x + 2y - 11 = 0, x + y2 + 6x2x+y+4= 0
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