Can someone explain to me how to find the center and radius of the circle: (x+5)^2 + (y-5)^2 = 100 ??? I'm a little confused.
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The equation of a circle of radius $\displaystyle r$ and the center in the point of coordinations $\displaystyle (a,b)$ is $\displaystyle (x-a)^2+(y-b)^2=r^2$ So, you must to identify $\displaystyle a,b,r$. Can you do it?
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