Start with x2 + 4x = 12 and complete the square, what is the equivalent equation?
A) (x + 2)2 = 16
B) (x + 2)2 = 14
C) (x + 4)2 = 16
D) (x + 4)2 = 28

The full question isn’t shown. part of it is cut off

“exterior angles of triangles. an exterior (or external) angle is the angle between one side of a triangle and the extension of an adjacent side. try this drag the orange dots on any vertex to reshape the triangle.” look to get to the answer i explained what it means and other things i hope it you .