(5x² - 3xy - y²) - (4x² - y²) = x² - 3xy
Доказательство :
(5x² - 3xy - y²) - (4x² - y²) = 5x² - 3xy - y² - 4x² + y² = x² - 3xy
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Verified answer
(5x² - 3xy - y²) - (4x² - y²) = x² - 3xy
Доказательство :
(5x² - 3xy - y²) - (4x² - y²) = 5x² - 3xy - y² - 4x² + y² = x² - 3xy