Question

give me answer plzz​..

Answer 1

Answer:

Step-by-step explanation:

if a + b + c = 0

then a + b³ + c³ = 3abc

since 28 + -15 + -13 = 0

28 + -15 + -13 = 3×28×-15×-13 = 16380

Answer 2

Answer:

Step-by-step explanation:

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