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COORDINATE GEOMETRY Answers - Worksheet B - Maths Genie

C2 COORDINATE GEOMETRY Answers - Worksheet B page 2 Solomon Press 7 a = (4(2) 2 −+−, 9(5) 2 +−) = (−3, 2) 8 a x2 + (y − 2)2 − 4 − 16 = 0 b radius = 149+ = 50 ∴ centre (0, 2) ∴ (x + 3)2 + (y − 2)2 = 50 b C2: (x − 1) 2 − 1 + (y − 4)2 − 16 − 60 = 0 c sub. (2, 7) into eqn of C: ∴ centre (1, 4) (2 + 3) 2 + (7 − 2) = 50 grad = 42