`\frac{2x-1}{x-x^2}`
`=\frac{2x-1}{x(1-x)}`
`=\frac{2(2x-1)}{2x(1-x)}`
`=\frac{4x-2}{2x(1-x)}`
`\frac{x-1}{2-4x+2x^2}`
`=\frac{x-1}{2(1-2x+x^2)}`
`=\frac{x-1}{2(1-x)^2}`
`=\frac{-(1-x)}{2(1-x)^2}`
`=\frac{-1}{2(1-x)}`
`=\frac{-x}{2x(1-x)}`
MTC: `2x(1-x)`