Question 840880
The best way to answer is to expect the trinomial to be factorable, which it is.
Area is (2x-1)(x+3).  This would suggest that the variable dimensions of the rectangular park are 2x-1 and x+3.  


The total length of the fencing needed for this perimeter is:
{{{2(2x-1)+2(x+3)}}}
{{{4x-2+2x+6}}}
{{{highlight(6x+4)}}}, the length of fencing needed.