2) x^3 + 8 - x · (x^2 - 9)

x^3 + 8 - x^3 + 9x = 8 + 9x

3)64 - 125x^3 + 125x^3 - 20x = 4

64 - 20x = 4

-20x = 4 - 64

-20x = -60

x = 3

Объяснение:

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