Asquare concert stage in the center of a fairground has an area of 4x^2 + 12x +9 ft^2. the dimensions of the stage have the form cx+d where c and d are whole numbers. find and expression for the perimeter of the stage. what is the perimeter when x = 2 ft?

Every weekday, mr. jones bikes from his home to his job. sometimes he rides along two roads, the long route that is shown by the solid lines. other times, he takes the shortcut shown by the dashed line. how many fewer kilometers does mr. jones bike when he takes the shortcut instead of the long route?