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04-08-2016
Mathematics

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What are the center and radius of the circle defined bt the equation x sqaured + y sqaured - 6x + 10y + 25 = 0?

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04-08-2016

Hello,

x²+y²+6x+10y+25=0
==>x²+2*3x+3²+y²+2*5y+5²-9=0
==>(x+3)²+(y+5)²=3²

Center is (-3,-5) and radius 3

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