Question

Find the value of the expression when n = -2
i) n^3 + 5n^2 + 5n – 2
ii) n^3 – 3(n – 10)

Answer 1

Answer:

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Step-by-step explanation:

$( - 2) {}^{ 3} + 5 {( - 2)}^{2} + 5( - 2) - 2 \\ - 8 + 5(4) + (- 10) - 2 \\ - 8 + 20 - 10 - 2 \\ 12 - 10 - 2 \\ 2 - 2 \\ 0$

$( - 2) {}^{3} - 3( - 2 - 10) \\ - 8 - 3( - 12) \\ - 8 + 36 \\ 28$