Question

(2m+4n)(2m-4n)
(7x-9y(7x+9y)​

Answer 1

Explicación paso a paso:

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

(2m+4n)(2m-4n) =》(2m)^2 - (4n)^2

4m^2 - 16n^2

(7x-9y)(7x+9y) =》(7x)^2 - (9y)^2

49x^2 - 81y^2