Numbers a, b and c are such that a- 0, b-0 and c-0. Prove that 2(a^3 + b^3 +c^3)- ab(a+b) +bc(b+c) +ca(c+a).

Question

Numbers a, b and c are such that a>- 0, b>-0 and c>-0. Prove that 2(a^3 + b^3 +c^3)>- ab(a+b) +bc(b+c) +ca(c+a).

PsyDAG · Answer

Are you confusing "-" with "="? To indicate ≥ (greater than or equal), use > key with option/alt key.