Question

Cuanto Es (8n-9m)(4n+6m)

Answer 1

$(8n-9m)(4n+6m)= \\ (8n*4n)+(8n*6m)+( (-9m)*4n) + ( (-9m)*6m)= \\ 32n^{2}+48nm-36nm-54m^{2} \\ 32n^{2}+12nm-54m^{2}$

Exitos.