Question

Factorise the following:

x² – 36 – 7xy + 42y

Answer 1

Given: x² – 36 – 7xy + 42y

We know that,

a + ba – b = a² – b²

Hence,

⇒ x² – 6² – 7yx + 6

⇒ x + 6x – 6 – 7yx + 6

⇒ x + 6x – 6 – 7y