Explain why the polynomial 144x2 − 200x + 81 is not a perfect square.
A)81x ≠ 2(20x ∙ 9)
B)200x ≠ 2(9x ∙ 12)
C)200x ≠ 2(12x ∙ 9)
D)144x ≠ 2(20x ∙ 12)

James wants to promote his band on the internet. site a offers website hosting for $4.95 per month with a $49.95 startup fee. site b offers website hosting for $9.95 per month with no startup fee. for how many months would james need to keep the website for site a to be a better choice than site b?