Question

Factorise : 4a2 – 9c2​

Answer 1

Answer:

(2a + 3a)(2a - 3a)

Step-by-step explanation:

4a^2 - 9a^2

= (2a)^2 - (3a)^2

Using identity III i.e. a^2 - b^2 = (a+ b) (a - b)

4a^2 - 9a^2 = (2a + 3a)(2a - 3a)