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Question 476800: Hi I am having some difficulties with this problem. I hope you can help. Thanks in advance.
Find the center and radius of the circle whose equation is x2 + 10x + y2 = 75.
Thanks
Answer by lwsshak3(11628)   (Show Source):
You can put this solution on YOUR website! Hi I am having some difficulties with this problem. I hope you can help. Thanks in advance.
Find the center and radius of the circle whose equation is x2 + 10x + y2 = 75
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x2 + 10x + y2 = 75
completing the square
(x^2+10x+25)+y^2=75+25=100
(x+5)^2+y^2=100
This is an equation of a circle of standard form: (x-h)^2+(y-k)^2=r^2, with (h,k) being the (x,y) coordinates of the center and r=radius.
For given equation:
Center:(-5,0)
r^2=100
r=10 (radius)
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