<PRE><B>Question 89928</B>


    The area of a rectangle of length X is given by 3x^2 + 5x. Find the width of the rectangle

                      Length of th rectangle = l = x 
                      Area of the rectangle =  A = 3x^2+5x
                       width of the rectangle = w = ?

                                         A = l*b
                                   3x^2+5x = x*w
                                         w = 3x^2+5x/x 
                                           = x(3x+5)/x

                                           = 3x+5.</PRE>