Question

Factorize
1. 16x^2 - 81y^2
2. 3ax - 9a2 + 12ax^2 - 4x^3
3. 9(2a-9b)^2 - 49a^2(b-a)^2
PLEASEEEE ANSWER IF YOU KNOW ANY ONE OF THEM

Answer 1

1) 16x^2-81y^2

we can write 16 x^2 as (4x)^2and 81y^2as(9y)^2

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

(4x+9y)(4x-9y)

please follow me