Arectangular room measures 12 feet by 15 feet. the entire room is to be covered with rectangular titles that measure 3 inches by 2 inches. if the tiles are sold at 10 for 1.20 what will be the cost to tile the room?

hello from mrbilldoesmath!

answer:   x (x+6)^2, choice b

discussion:

factor x out of the equation:

x^3 + 12x^2 + 36x = x (x^2 + 12x + 36).

note that 6+6 = 12 and 6*6 = 36 so the above factors into:

x (x+6)^2

which is choice b

you,

mrb