Question

please send me step wise step ​

Answer 1

Answer:

(3p-7q)^3 = (a-b)^3

=a³-3a²b+3ab²-b³

Step-by-step explanation:

= (3p)^3 - 3(3p)^2 (7q) + 3(3p)(7q)^2 - (7q)^3

=27p^3 - (9p^2)(21q) + 9p (49q^2) - 343q^3

= 27p^3 - 189p^2 q + 441p q^2 - 343q^3