Question

factorize competlely 16a^4-81b^4

Answer 1

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

Answer 2

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