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QUESTION 4 The equations of two circles are x + 10x + yz - 12y =3 and x2 - 6x + y - 2qy =

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QUESTION 4 The equations of two circles are x + 10x + yz - 12y =3 and x2 - 6x + y - 2qy = 9. (a) Find the centre and radius of each circle, giving your answers in terms of q where necessary. (6) (b) Given that the distance between the centres of the circles is V80, find the two possible values of q. (3)

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