Question

(a-b)whole cube-(a-b)whole cube-6b (a square-b square

Answer 1

$(a-b)^3-(a-b)^3-6b(a^2-b^2)$

this is question
so

apply formula 
so
$a^3-b^3-3ab(a-b)$-$a^3-b^3-3ab(a-b)$-6ba²+6b³



i hope this will help u 
by DEVANSH