Question 397253
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Hi
A = L*W = s*s for a square where s is the length of each side
Question states***
  s^2 = 45 cm^2
  s = {{{sqrt(45cm^2)}}}  Tossing out negative solution for length
    s = {{{sqrt(9*5)cm^2}}} 
    s = {{{3 sqrt(5) cm}}} 
|not uncommon for answers to be given in simplest radical form

Note: 3 * {{{sqrt(5)}}} = 6.7082 = sqrt(45)}}}