Ответ:
1) 3у(у³ - 3у - 4) = 3у⁴ - 9у² - 12у
2) -c³d⁴(c² - d³) = -c^5d⁴ + c³d^7
3) 5c(c² - d²) - 5c³ = 5c³ - 5cd² - 5c³ = -5cd²
4) 2a(a - b) + 2b(a + b) = 2a² - 2ab + 2ba + 2b² = 2a² + 2b²
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Ответ:
1) 3у(у³ - 3у - 4) = 3у⁴ - 9у² - 12у
2) -c³d⁴(c² - d³) = -c^5d⁴ + c³d^7
3) 5c(c² - d²) - 5c³ = 5c³ - 5cd² - 5c³ = -5cd²
4) 2a(a - b) + 2b(a + b) = 2a² - 2ab + 2ba + 2b² = 2a² + 2b²