Factories:
(2a + 3b)2 – 16c2
Given,
= (2a + 3b)2 – (4c)2
By using the formula a2 – b2 = (a + b)(a – b)
We get,
(2a + 3b)2 – 16c2 = (2a + 3b)2 – (4c)2
= {(2a + 3b) + 4c}{(2a + 3b) – 4c}
= (2a + 3b + 4c)(2a + 3b – 4c)