Объяснение:
1. 8х(3х^5-4) = 24х^6-32х
2. 15а-4а(а-7)+а² = 15а-4а²+28а+а² = 43а-3а²
3. (х+4)(х-15) = х²-15х+4х-60 = х²-11х-60 (5)
(х-4)(15-х) = 15х-х²-60+4х = -х+19х-60 (1)
(х-4)(х-15) = х²-15х-4х+60 = х²-19+60 (2)
4. (m+3)(4m²-5m-9) = 4m³-5m²-9m+12m²-15m-27 =
4m³+7m²-24m-27
Объяснение:
1. 8х(3х^5-4) = 24х^6-32х
2. 15а-4а(а-7)+а² = 15а-4а²+28а+а² = 43а-3а²
3. (х+4)(х-15) = х²-15х+4х-60 = х²-11х-60 (5)
(х-4)(15-х) = 15х-х²-60+4х = -х+19х-60 (1)
(х-4)(х-15) = х²-15х-4х+60 = х²-19+60 (2)
4. (m+3)(4m²-5m-9) = 4m³-5m²-9m+12m²-15m-27 =
4m³+7m²-24m-27