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.

⇒ a²x² – 2abx – abx + 2b² = 0

⇒ ax(ax – 2b) – b(ax – 2b) = 0

⇒ (ax – b)(ax – 2b) = 0

⇒ x = b/a, 2b/a