Question

Factorize- (0.04a^2-9)​

Answer 1

Answer:

0.04a^2-9=( 0.2a)^2-(3)^2

Use the given formula:-

a^2-b^2=(a+b)(a-b)

Answer 2

This uses the identity of (a+b)^2
So the answer is (0.2a - 3)^2 - 1.2a