x^2+ax-2x+1-2a>0
(x-2)a>2x-1-x²
a>(2x-1-x²)/(x-2)
amin=-2
-2>(2x-1-x²)/(x-2)
(-x²+2x-1+2x-4)/(x-2)0
x-2>0
x>2