Question 817225
  <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,
create a rectangle that has an area of 45 square cm and a perimeter of 36 cm.
<img src='http://img585.imageshack.us/img585/479/rectangle.png' border='0'/></a>
{{{A = lw = 45cm^2}}}  0r l = 45/w
{{{P = 2(45/w) + 2w = 36cm}}}   |Multiplying thru by w so as all denominators = 1
   90 + 2w^2 = 36w
   w^2 - 18w + 45 = 0 
  (w-15)(w-3) = 0
  (w-15) = 0 , w = 15cm ,  l = 3cm
0r(w-3) = 0 ,  w = 3cm  ,  l = 15cm
Dimensions of the Rectangle are 3cm  by 15cm
 A = 45cm^2  and Perimeter = {{{2*3cm + 2*15cm = 36cm}}}