Mathematics · Algebra
If 1a + 1b + 1c = 0, then which of the following relations is correct?
- 1ab + bc + ca = 1
- 2a3 + b3 + c3 = 3abc
- 3a2 + b2 + c2 = ab + bc + ca
- 4(a + b + c)2 = a2 + b2 + c2✓
Correct answer
(a + b + c)2 = a2 + b2 + c2
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