How do you find the center and radius of the circle given #x^2+(y+2)^2=4#?
Please see the explanation.
The standard form for the equation of a circle is:
I suggest that you modify any given equation into this form and then report the easily observed values.
Change the + 2 to - -2:
Insert a -0 in the x term:
Write the constant as a square:
It is easily observed that the center is