17a+17 = 17(а+1)
2b³-4b² = 2b²(b-2)
a+a²+a³ = a(1+a+a²)
Раскрыть скобки:
(a+3b)² = a² + 6ab + 9b²
(2a+b)(3a-b) = 6a² - 2ab + 3ab - b² = 6a² + ab - b²
(2a+b)³ = (2a)³ + 3×4a²b + 3×2ab²+b³ =
= 8a³ + 12a²b + 6ab² + b³
Держи <3
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Answers & Comments
17a+17 = 17(а+1)
2b³-4b² = 2b²(b-2)
a+a²+a³ = a(1+a+a²)
Раскрыть скобки:
(a+3b)² = a² + 6ab + 9b²
(2a+b)(3a-b) = 6a² - 2ab + 3ab - b² = 6a² + ab - b²
(2a+b)³ = (2a)³ + 3×4a²b + 3×2ab²+b³ =
= 8a³ + 12a²b + 6ab² + b³
Держи <3