Предмет: Алгебра, автор: aridmitrieva20

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(3x+2y)^3+729y^3

Ответы

Автор ответа: krosochka

0

Это формула: сумма кубов.
(3x + 2y)^3 + (9y)^3 = (3x+2y+9y) * ((3x+2y)^2 - (3x+2y)*9y + (9y)^2) = (2x + 11y) * (9(x^2) - 15xy + 67 (y^2))

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