问题描述：
这是一道英文数学题.厉害的来,
The sides of a square are X feet long.
Write an expression that represents the area of the square in square feet if the lenght of the side of the square is changed to one less than three times the lenght of the side of the square.
不用翻译
The sides of a square are X feet long.
Write an expression that represents the area of the square in square feet if the lenght of the side of the square is changed to one less than three times the lenght of the side of the square.
不用翻译
问题解答：
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