Answers

2015-06-20T15:49:51+05:30
X³ + y³ + z³ - 3xyz = (x + y + z) (x² + y² + z² - xy - yz - zx)
But, x+y+z = 0
.·. x³ + y³ + z³ - 3xyz = 0 (x² + y² + z² - xy - yz - zx)
⇒x³ + y³ + z³ - 3xyz= 0
⇒x³ + y³ + z³ = 3xyz
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