Question

If a- b = 3 find a^3 -B^ 3cube -9AB
Plz answer

Answer 1

Answer:

a^3 - b^3 - 9 .a.b

= (a - b )^3 + 3 .a .b - 9. a.b

= (3)^3 - 6 .a.b

=27 - 6ab

ANS.

Answer 2

Answer:

21ab is correct please thanks me