find 3 n square + 23n+34
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3n^2+23n +34=0
= 3n^2+(17n+6n)+ 34=0
3n^2+6n+17n+34=0
3n(n+2)+17(n+2)=0
(3n+17)(n+2)=0
either 3n+17=0
n=-17/3
OR n+2=0
n=-2
therefore n=-2,-17/3
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