Which formula would you use to find the perimeter of a rectangle A:P=4x side
B:P=length + Width
C:P=(2x length) + (2x Width)
D:P=Length x Width

none of the above.

for one of the equations to be used in the process, there has to be a term in the equation since squared is .

since there is only a term in the first equation, we cannot derive a from completing the square.

solving with completing the square

the answer will be