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Looking for an answer to all of the following in the picture but especially question 7

Looking for an answer to all of the following in the picture but especially question-example-1
User Leifericf
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1 Answer

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Given


3x^3+10x^2-x-12

Answer

X-3 is factor if for x =3 , above expression is 0


\begin{gathered} 3(3)^3+10(3)^2-3-12 \\ 81+270-15=336\\e0 \\ \end{gathered}

So x-3 is not a factor,

User Danra
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