Question

Resolve into factors 36x^2-81y^2

Answer 1

the factors are
(6x+9y)(6x-9y)
use the identiy
 (a+b)(a-b)=$a^{2} -b^{2}$

Answer 2

36x^2 - 81y^2
(6x)^2 - (9y)^2
(6x-9y) (6x+9y)
thats your ans...