Write the Equation in Standard Form to Find the Center $$x ^ { 2 } + y ^ { 2 } + 6 x + 14 y + 37 = 0$$

Multiple Choice

Write the equation in standard form to find the center and radius of the circle.
- $$x ^ { 2 } + y ^ { 2 } + 6 x + 14 y + 37 = 0$$

A) $( x + 3 ) ^ { 2 } + ( y + 7 ) ^ { 2 } = 21 ;$ center $( - 3 , - 7 )$ , radius $\sqrt { 21 }$
B) $( x + 3 ) ^ { 2 } + ( y + 7 ) ^ { 2 } = 21 ;$ center $( - 3 , - 7 )$ , radius 21
C) $( x + 3 ) ^ { 2 } + ( y + 7 ) ^ { 2 } = 21 ;$ center $( 3,7 )$ , radius 21
D) $( x - 3 ) ^ { 2 } + ( y - 7 ) ^ { 2 } = 21 ;$ center $( 3,7 )$ , radius $\sqrt { 21 }$