Question

a-b-c holl cube formula​

Answer 1

Answer:

a³-b³-c³-3a²b+3ab²-3a²c+3ac²-3bc²-3b²c

Step-by-step explanation:

(a-b-c)³ = {a-(b+c)}³

           = a³-3a²(b+c)+3a(b+c)²-(b+c)³

           = a³-3a²b-3a²c+3a(b²+2bc+c²) - (b³+3b²c+3bc²+c³)

           =  a³-3a²b-3a²c+3ab²+6abc+3ac²-b³-3b²c-3bc²-c³

           =  a³-b³-c³-3a²b+3ab²-3a²c+3ac²-3bc²-3b²c