Question 987452
3x -1 = Sqrt(9x^2+9) 
square both sides of the =
9x^2 - 6x + 1 = 9x^2 + 9
subtract 9x^2 from both sides of =
-6x + 1 = 9
subtract 1 fro both sides of =
-6x = 8
x = -1.333333333  
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check the answer
3(-1.333333333) - 1 = Sqrt(9(-1.333333333^2) +9)
-5 = + or - (4.99999999999)
therefore,
-5 approx -5
our answer checks,
x = -1.333333333 
note that the answer becomes positive when squared