Answer
Centre = (-1, 2)
Radius = 3
Work Step by Step
$x^{2}$ + 2x + $y^{2}$ - 4y = 4
$(x+1)^{2}$ - 1 + $(y-2)^{2}$ - 4 = 4
$(x+1)^{2}$ + $(y-2)^{2}$ = 9
$(x+1)^{2}$ + $(y-2)^{2}$ = $3^{2}$
Centre = (-1, 2)
Radius = 3
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Chapter 13 - Section 13.1 - The Parabola and the Circle - Exercise Set - Page 926: 25
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