Answer: The area of the living room in square feet is given by:
A = length × width
Before the expansion, the length is 12 feet and the width is 10 feet. Therefore, the initial area is:
A = 12 ft × 10 ft = 120 ft²
After the expansion, the length becomes 12 + x feet, while the width remains the same at 10 feet. Therefore, the area after the expansion is:
A = (12 + x) ft × 10 ft = 120 + 10x ft²
So, the expressions that represent the area of the living room in square feet are:
120 ft²
120 + 10x ft²
Therefore, both expressions are correct.
Explanation: