Answer:
so since I'm a GENIUS ik this *cough*
basically, bruuuh perfect squared trinomial is based on this pattern ax^2+ax+a well some -bleep- like that. so you have to solve for c in the equation to make it a "perfect trinomial square" now divide 9 divided by 2 which equals ([tex]\frac{9}{2}[/tex])^2and you square both the 9 and um 2 which equals ur answer
!!! 81/4 !!!
hope that makes sense <33
