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C1 CIRCLES Answers - Worksheet B

1 a (x - 3)2 + (y + 2)2 = 25 2 a = ( -52+ 3 , 6+8
2
) = (-1, 7)
2 2
b sub. (x - 3) + [(2x - 3) + 2] = 25 b radius = 16 +…

Page 2

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C1 CIRCLES Answers - Worksheet B page 2

7 a = ( -4 +2( -2) , 9 + ( -5)
2
) = (-3, 2) 8 a x2 + (y - 2)2 - 4 - 16 = 0
b radius = 1 + 49 = 50 centre (0, 2)
(x…

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