The area of a square is 5 more than its perimeter. Find the length of a side.

Question

quadrilateral expression

Answer 1

Let s = the length of a side

A = P+5

s²=4s+5

s²-4s-5=0

(s-5)(s+1)=0

s-5=0   or   s+1=0

   s = 5          s =-1, an illogical answer

 

So, the side of the square measures 5.