In factorization, we write the middle term of the quadratic equation either as a sum of two numbers or difference of two numbers such that the equation can be factorized.

⇒ 48x² – 16x + 3x – 1 = 0

⇒ 16x(3x – 1) + (3x – 1) = 0

⇒ (16x + 1)(3x – 1) = 0

⇒ x = -1/16, 1/3