$6x^3 -x^2 +2x + 1$
Work Step by Step
$(3x+1)(2x^2-x+1)$ $= (3x \times 2x^2) + (1 \times 2x^2) + (3x \times - x) + (1\times-x) + (3x \times 1) +(1\times1)$ $=6x^3 + 2x^2 -3x^2 - x +3x + 1 $ $=6x^3 -x^2 +2x + 1$
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