Ответ:
1.
(6x² - 4xy - y²) - (*) = 4x² + y²
(*) = (6x² - 4xy - y²) - (4x² + y²)
(*) = 6x² - 4xy - y² - 4x² - y²
(*) = 2x² - 4xy - 2y²
(6x² - 4xy - y²) - (2x² - 4xy - 2y²) = 4x² + y²
Проверим:
6x² - 4xy - y² - 2x² + 4xy + 2y² = 4x² + y² - верно.
2.
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Verified answer
Ответ:
1.
(6x² - 4xy - y²) - (*) = 4x² + y²
(*) = (6x² - 4xy - y²) - (4x² + y²)
(*) = 6x² - 4xy - y² - 4x² - y²
(*) = 2x² - 4xy - 2y²
(6x² - 4xy - y²) - (2x² - 4xy - 2y²) = 4x² + y²
Проверим:
6x² - 4xy - y² - 2x² + 4xy + 2y² = 4x² + y² - верно.
2.