Write the Word or Phrase That Best Completes Each Statement $$x ^ { 2 } + y ^ { 2 } + A x + B y + C = 0$$

Short Answer

Write the word or phrase that best completes each statement or answers the question.
Provide the missing information.
-An equation of a circle written in the form $$x ^ { 2 } + y ^ { 2 } + A x + B y + C = 0$$ = 0 is called the form of an equation of a circle.