#a + 2c + 3b = 0# then what is # a ^3 + 8 b ^3 + 27c^3#?
1 Answer
Feb 18, 2015
We can rewrite one of the letters as an expression in the others.
Then we replace every
Extra :
If the first expression had been
(and I suspect that it was!!)
Then the
and, since
Answer: