\(2x^3-x^2+5x+3\)
\(=2x^3+x^2-2x^2-x+6x+3\)
\(=x^2\left(2x+1\right)-2x\left(2x+1\right)+3\left(2x+1\right)\)
\(=\left(x^2-2x+3\right)\left(2x+1\right)\)
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