Asked by princess
Find the centres and radii of the circles given by
A)x2+y2=6x
B)x2+y2-6x+14y+49=0
A)x2+y2=6x
B)x2+y2-6x+14y+49=0
Answers
Answered by
Steve
x^2+y^2 = 6x
x^2-6x + y^2 = 0
x^2-6x+9 + y^2 = 9
(x-3)^2 + y^2 = 3^2
x^2+y^2-6x+14y+49 = 0
x^2-6x + y^2+14y+49 = 0
x^2-6x+9 + y^2+14y+49 = 9
(x-3)^2 + (y+7)^2 = 3^2
x^2-6x + y^2 = 0
x^2-6x+9 + y^2 = 9
(x-3)^2 + y^2 = 3^2
x^2+y^2-6x+14y+49 = 0
x^2-6x + y^2+14y+49 = 0
x^2-6x+9 + y^2+14y+49 = 9
(x-3)^2 + (y+7)^2 = 3^2
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