Question

9{(p2 + 3px + 3pq +9qx)(p – 3q)} = (p2 - 9q²)​

Answer 1

Answer:

=9(p^3+3p^2x+3p^2x+9pqx-3p^2q-9pq^2-9pq^2-

27q^2x)

=9p^3+27xp^2+27xp^2+81pqx-27qp^2-81pq^2-81pq^2-243xq^2

=9p^3+54xp^2+81pqx-27qp^2-243xq^2