Question

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34.6. 1) (a – 1)(a² + a + 1) – a²(a - 8);
3) 2a³ + 7 (x² – x + 1)(x + 1);​

Answer 1

34.6
1) (a – 1)(a² + a + 1) – a²(a – 8) = a³ – 1 – a³ + 8a² = –1 + 8a²
3) 2a³ + 7 (x² – x + 1)(x + 1) = 2a³ + 7(x³+1) = 2a³ + 7x³ + 7