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kurchievskaial
@kurchievskaial
August 2022
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Решите задания с 7 по 9
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Regent1828
Verified answer
7) (6x
² - 4xy - y²) - (*) = 4x² + y²
(*) = 6x² - 4x² - 4xy - y² - y² =
2x² - 4xy - 2y²
8)
(13n + 29) - (4n - 7) = 13n - 4n + 29 + 7 = 9n + 36 = 9*(n + 4)
Для любого n∈N выражение 9*(n + 4) кратно 9
9) 2a²b³ = -3
6a²b³ = 3*2a²b³ = 3*(-3) =
-9
2a⁴b⁶ = 2*(a²b³)² = 2*(-1,5)² = 2*2,25 =
4,5
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Answers & Comments
Verified answer
7) (6x² - 4xy - y²) - (*) = 4x² + y²(*) = 6x² - 4x² - 4xy - y² - y² = 2x² - 4xy - 2y²
8) (13n + 29) - (4n - 7) = 13n - 4n + 29 + 7 = 9n + 36 = 9*(n + 4)
Для любого n∈N выражение 9*(n + 4) кратно 9
9) 2a²b³ = -3
6a²b³ = 3*2a²b³ = 3*(-3) = -9
2a⁴b⁶ = 2*(a²b³)² = 2*(-1,5)² = 2*2,25 = 4,5