Question

can someone explain this ?​

Answer 1

Answer:

Ya that's correct.

Step-by-step explanation:

see before we must use the formula of Expansions which is a³+b³+c³-3abc=(a+b+c) (a²+b²+c²-ab-bc-ca)

and then we have to substitute the value from the equation as the quemestion and then it's easy to do