Ответ:
1/27*х³ + 1/125*у³ = (1/3)³x³ + (1/5)³y³ = (x/3)³ + (y/5)³
По формуле a³ + b³ = (a + b)(a² - ab + b²):
(x/3 + y/5)(x²/9 - xy/15 + y²/25)
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Ответ:
1/27*х³ + 1/125*у³ = (1/3)³x³ + (1/5)³y³ = (x/3)³ + (y/5)³
По формуле a³ + b³ = (a + b)(a² - ab + b²):
(x/3 + y/5)(x²/9 - xy/15 + y²/25)