Answer:
Step-by-step explanation:
x^2 + 18x + 81 = (x + 9)(x + 9)
The figure is a square
Area = (x + 9)(x + 9)
Length = x + 9
L*W = Area
(x + 9)*w = (x + 9) (x + 9)
divide by x + 9
w = ((x + 9)(x+9)) / ( x + 9) one of the x + 9 s cancel
w = x + 9
Since the L = w, the figure is a square.
