The square below has an area of x² + 4 x + 4 square meters. What expression represents the length of one side of the square?

Work Shown:

A = area of bottom rectangular face = 10*5 = 50

B = area of back rectangular face = 12*10 = 120

C = area of slanted front rectangular face = 13*10 = 130

D = area of left triangle = 0.5*base*height = 0.5*5*12 = 30

E = area of triangle on right = 0.5*base*height = 0.5*5*12 = 30

S = total surface area

S = A+B+C+D+E

S = 50+120+130+30+30

S = 360