`2x^3 - 5x^2 + 8x -3`
`=2x^3-4x^2 - x^2 + 2x +6x -3`
`= 2x^3 -4x^2 +6x -x^2 +2x -3`
`= 2x(x^2-2x+3) - (x^2 - 2x^3 +3)`
`=(2x-1) (x^2-2x+3)`
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`2x^3 - 5x^2 + 8x -3`
`= 2x^3 -4x^2-x^2 +2x+6x -3`
`= (2x-1)x^2 -2x(2x-1) + 3(2x-1)`
`=(2x-1) (x^2-2x+3)`