Question 119389
Factor Each Expression: 
3p cubed - 21 p squared-p+7 
3p^3-21p^2-p+7
3p^2(p-7)-(p-7)
(p-7)(3p^2-1)
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This could be continued as follows:
(p-7)((sqrt3)p-1)((sqrt3)p+1)
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Cheers,
Stan H.