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.

⇒

⇒ m²x² + n² = mn – 2mnx

⇒ m²x² + 2mnx – mn + n² = 0

⇒ (mx + n)² = mn

⇒ mx + n = �√mn