Find the centre and radius of the circle with the following equations: (a) x 2 + y
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Find the centre and radius of the circle with the following equations:
(a) x2 + y2 − 6x − 8y −144 = 0
(b) x2 + y2 + 2x − 3y + 3 = 0
(c) x2 + y2 − 3x + 5y − 50 = 0
(d) x2 + y2 + 2y − 3 = 0
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