Question

1) (m + n)³ - (m - n)³​

Answer 1

Answer:

Step-by-step explanation:

$(m+n)^{3}-(m-n)^{3}$

$=m^{3}+n^{3}+3m^{2}n+3mn^{2} -( m^{3}+n^{3}-3m^{2}n+3mn^{2})\\=m^{3}+n^{3}+3m^{2}n+3mn^{2}- m^{3}-n^{3}+3m^{2}n-3mn^{2}\\=6m^{2}n$