(3x-1)(4x+3) <> (3x-1)(2x-5) (4x+3) <> (2x-5) x!=1/3 4x+3 <> 2x-5 4x+8 <> 2x 2x+8 > 0 => (3x-1)(4x+3) > (3x-1)(2x-5)