Faktorkan ×2-×-1>3×2+4x-1 = ×2 artinya x pangkat 2

2²-x-1>3×2+4x-1
=2²-x>6+4x
=4-x>6+4x
=4-x-4x>6
= -5x>6-4
= -5x>2
= -5x:(-5)<2:(-5)
=x<2:(-5)
=x< -2/5