Question 655564
  <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,
{{{A[S] = s^2 = 4x^2-12xy+9y^2 = (2x-3y)(2x-3y)}}}
   s = (2x-3y)
{{{P[S] = 4s = 4(2x-3y) = 8x - 12y}}}