Aconference room is in the shape of a rectangle. its floor has a length of (x − 4) meters and a width of (3x − 1) meters. the expression below represents the area of the floor of the room in square meters:

(x − 4)(3x − 1)

which of the following simplified expressions represents the area of the floor of the conference room in square meters? (5 points)

a. x2 − 13x + 4
b.3x2 − 13x + 4
c.3x2 − 11x + 4
d. x2 − 12x + 4