a) \(\frac{-2x^3-3x^2+12x+2}{2x-1}=\frac{\left(2x-1\right)\left(-x^2-2x+5\right)+7}{2x-1}\)
vì \(\left(2x-1\right)\left(-4x^2-2x+5\right)⋮\left(2x-1\right)\) nên để phép chia hết thì \(\left(2x-1\right)\inƯ\left(7\right)=\left\{\pm1;\pm7\right\}\)
vậy \(x=\left\{-3;0;1;4\right\}\)