Simplify the expression. use the variables, numbers, and symbols that are shown. drag them to the appropriate box in the polynomial. use standard polynomial format.
x(2x + 3) + (x - 3)(x - 4)

Apinhole camera is made out of a light-tight box with a piece of film attached to one side and pinhole on the opposite side. the optimum diameter d(in millimeters) of the pinhole can be modeled by d=1.9[ (5.5 x 10^-4) l) ] ^1/2, where l is the length of the camera box (in millimeters). what is the optimum diameter for a pinhole camera if the camera box has a length of 10 centimeters