The length of a standard jewel case is 3 cm more than it’s worth. the area of the rectangular top of the case is 238 cm² find the length and width of the jewel case.

The area of a rectangle is 10 cm^2. one side of the rectangle is x cm. express the perimeter of the rectangle in terms of x and show that this rectangle cannot have a perimeter of 12 cm. the perimeter of the rectangle in terms of x is __ cm