Answers: 2
is our equation first, get all the x terms on one side so the equation equals a constant number
Then add to both sides the square of half of the coefficient of x : the coefficient of x here is 2 sothe square of half of 2 is 
then
If you factor the left side you get 
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Rewrite the equation by completing the square 3+x=x^2+3x...
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