Answers

  • Brainly User
2014-11-08T21:27:06+05:30
If a+b=3
then cubing both side we get
a³+b³+3ab(a+b)=27so a³+b³=27-3ab(b+a)
0
2014-11-08T21:34:31+05:30
 a+b=3

a³+b³+3ab(a+b)=27

so a³+b³=27-3ab(b+a)

= 27 - 3 ab^2 - 3a^2b
0