Solve the following quadratic equations by factorization:

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.

⇒ (16 – x)(x + 1) = 15x

⇒ -x² – x + 16x + 16 = 15x

⇒ x² = 16

⇒ x = �4