Factor 3x^2-18x+27 completely

a) (x-3)^2
b) 3(x-3)^2
c) 3(x+3)^2
d) (x-3)(x+3)

Jack has a rectangular piece of land, the area of which is represented by a1 = 9.5l. his brother has a different rectangular piece of land, the area of which is represented by a2 = l(14 − l). let a represent the area in square meters and l represent the length in meters of the pieces of land. the two equations plotted on a graph meet at a point as shown in the image