Question

Evaluate x³+y³+z³ if x=y, z =-1.​

Answer 1

Answer:

$2 {y}^{3} - 1$

Step-by-step explanation:

${x}^{3} +{y}^{3} + {z}^{3} \\ = {y}^{3} + {y}^{3} + { - 1}^{3} \\ = 2 {y}^{3} - 1$

Answer 2

Answer:

Step-by-step explanation:

X³+x³+(-1)³

2x³-1