Find radius and center of the equations Thanks
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1)Add 16 to both sides $\displaystyle x^2+8x+16 + 8 + y^2= 16 \implies (x +4)^2 + y^2 = (\sqrt{8})^2$ What is the radius and center? 2)Multiply by 4 to get $\displaystyle x^2+y^2 = 2^2$. What is the radius and center?
dear "y2" not in my question..........
I have no idea what that means!
I mean y square is not in the equation
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