Question

Which polynomial is prime?


x3 + 3x2 + 2x + 6

x3 + 3x2 – 2x – 6

10x2 – 4x + 3x + 6

10x2 – 10x + 6x – 6

please help

Answer 1

\[x^3+3x^2+2x+6=x^2(x+3)+2(x+3)=?\]
\[x^3+3x^2-2x-6=x^2(x+3)-2(x+3)=?\]
\[10x^2-4x+3x+6=10x^2-x+6 \] Factors can not be made.
\[10 x^2-10x+6x-6=10 x(x-1)+6(x-1)=?\]
can you answer now?

Answer 2

the third one?

Answer 3

I think so too, given the work done by surjithayer

Answer 4

correct.