Problem: a rectangular circuit board is designed to have width w inches , perimeter p inches , and area x square inches . which of the following equations must be true ? 
Options: ['a ) w ^ 2 + pw + x = 0', 'b ) w ^ 2 - pw + 2 x = 0', 'c ) 2 w ^ 2 + pw + 2 x = 0', 'd ) 2 w ^ 2 - pw - 2 x = 0', 'e ) 2 w ^ 2 - pw + 2 x = 0']
e