How do you write the standard from of the equation of the circle given center (-2, 4) and radius 7?
The standard or general form of a circle is
In this problem,
Plugging these values into the equation gives:
Some teachers refer to the "standard form" as the equation resulting from squaring the binomials and gathering all terms on one side. This is uncommon, but here it is.
Rearranging and combining the constant terms gives