a. Show that x 2 + y 2 10x + 4y 20 = 0 can
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a. Show that x2 + y2 − 10x + 4y − 20 = 0 can be written in the form (x − a)2 + (y − b)2 = r2, where a, b and r are numbers to be found.
b. Hence write down the centre and radius of the circle with equation x2 + y2 − 10x + 4y − 20 = 0.
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a To write the given equation in the form x a2 y b2 r2 we need to complete the square for both the x ...View the full answer
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Related Book For 
Edexcel AS And A Level Mathematics Pure Mathematics Year 1/AS
ISBN: 9781292183398
1st Edition
Authors: Greg Attwood
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