Question

what is (a+b+c) ^3 =?​

Answer 1

(a+b+c)³=[(a+b)+c]³=(a+b)³+3(a+b)²c+3(a+b)c²+c³

(a+b+c)³=(a³+3a²b+3ab²+b³)+3(a²+2ab+b²)c+3(a+b)c2+c³

(a+b+c)³=a³+b³+c³+3a²b+3a²c+3ab²+3b²c+3ac²+3bc²+6abc