Factories:
36c2 – (5a + b)2
Given,
= (6c)2 – (5a + b)2
By using the formula a2 – b2 = (a + b)(a – b)
We get,
36c2 – (5a + b)2 = (6c)2 – (5a + b)2
= {(6c) + (5a + b)}{(6c) – (5a + b)}
= (6c + 5a + b)(6c – 5a – b)