(3x + 1)(4x - 5) = (3x + 1)(2x - 1)
(3x + 1)(4x - 5) - (3x + 1)(2x - 1)= 0
(3x + 1)(4x - 5 - 2x + 1) = 0
(3x + 1)(2x - 4) = 0
или 3x + 1 = 0 или 2x - 4 = 0
3x = - 1 2x = 4
x₁ = - 1/3 x₂ = 2
