3. The length of a living room is 12 feet and its width is 10.5 feet. The length of the room is being
expanded by x feet. Write an expression to represent the new AREA of the living room in
square feet. You do not need to include the unit of square feet, just write the expression. Feel
free to sketch out a rectangular room and label the given measurements to help you visualize.
Please I need it before tomorrow