Question

Evaluate x³ + y + z ³ - 3 × y z
when x = - 2, y = - 1 and z = 3.​

Answer 1

xcube =-8

ycube =-1

zcube= 27

x cube+ y cube + z cube=18

-3xyz = -3×-2×-1×3

= -18

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Answer 2

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