Question

(a/3-3b) (a^2/9+ab+9b^2)

Answer 1

(a/3-3b)(a^2/9+ab+9b^2)

a/3×a^2/9+a/3×ab+a/3×9b^2-3b×a^2/9-3b×ab-3b×9b^2

a^3/27+a^2b/3+9ab^2/3-3a^2b/9-3ab^2-27b^3

=a^3/27-27b^3

i hope i have help u!!!!