Question

expand (2a-7b)^3
$(2a - 7b) ^{3}$

Answer 1

Answer:

Step-by-step explanation:

(2a-7b)³=(2a)³-(7b)³-3×2a×7b(2a-7b)

=8a³-343b³-42ab(2a-7b)

=8a³-343b³-84a²b-294b²a

Answer 2

Answer:For my answer i got this

Step-by-step explanation:

(2a-7b)³=(2a)³-(7b)³-3×2a×7b(2a-7b)

=8a³-343b³-42ab(2a-7b)

=8a³-343b³-84a²b-294b²a so if this is correct can

someone tell me