1. 15·t = 15·2 = 30
2. 11·(x – 2) = 11·(–4 – 2) = 11·(–6) = –66
3. a² + 2b – c = 3² + 2·(–1) – 0 = 9 – 2 = 7
4. (5m – 2n)² = (5·(–7) – 2·(–15))² = (–35 + 30)² = (–5)² = 25
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Answers & Comments
1. 15·t = 15·2 = 30
2. 11·(x – 2) = 11·(–4 – 2) = 11·(–6) = –66
3. a² + 2b – c = 3² + 2·(–1) – 0 = 9 – 2 = 7
4. (5m – 2n)² = (5·(–7) – 2·(–15))² = (–35 + 30)² = (–5)² = 25