Question

. If x = 1, y = 1 and z = -2, then the value of
expression x³ + y³ + z³ - 3xyz is

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Answer 1

Answer:

0

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Answer 2

$x = 1 \\ y = 1 \\ z = - 2 \\ {x}^{3} + {y}^{3} + {z}^{3} - 3xyz \\ = {1}^{3} + {1}^{3} + { - 2}^{3} - 3 \times 1 \times 1 \times - 2 \\ = 1 + 1 - 8 + 6 \\ = 0$

Hope this will help....