Which expression represents the area of the rectangle

A concert hall is in the shape of a rectangle.  Its floor has a length of (x + 6) meters and a width of (2x - 3) meters.  Which
of the following simplified expressions represents the area of the floor?
A.)  2x² + 9x - 18
B.)  2x² + 15x - 18
C.)  x² + 5x - 18
​D.)  x² + 9x + 18 

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Area of a rectangle = length x width

Area = (x + 6)(2x - 3)
=  2x² - 3x + 12x - 18   {used FOIL method / distributive property}
=  2x² + 9x - 18   {combined like terms}

A.)  2x² + 9x - 18

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