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KARAZINO
@KARAZINO
August 2022
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ДАЮ 56 БАЛЛОВ!!ЭТО ИЗИ АЛГЕБРА 7 КЛАСС.Пожалуйста помогите, кучу уроков, ничего не успеваю, туплю :(❤❤ Заранее большое спасибо и лучший ответ от меня РЕШАТЬ 1 ВАРИАНТ ТОЛЬКО ХОТЬ 1 ЗАДАНИЕ ПЖ
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Regent1828
Verified answer
2).
а) (x - y)*(*) = xa - ya
(*) = (xa - ya)/(x - y) = a(x - y)/(x - y) = a
б) (*)*(2b - 3c) = 2bm - 3cm
(*) = (2bm - 3cm)/(2b - 3c) = m(2b - 3c)/(2b - 3c) = m
в) (2x - y + 3zx)*(*) = -2x²a² + ya²x - 3za²x²
(*) = -a²x(2x - y + 3zx)/(2x - y + 3zx) = -a²x
д) (3x - 4y)(4x + 3y) - (4x - 3y)(3x + 4y) =
= 12x² - 16xy + 9xy - 12y² - 12x² - 16xy + 9xy + 12y² =
= -32xy + 18xy = -14xy
e) (2b + a³)(a² - 2b) - (a² + 2b)(a³ - 2b) =
= 2a²b + a⁵ - 4b² - 2a³b - a⁵ + 2a²b - 2a³b + 4b² =
= 4a²b - 4a³b = 4a²b(1 - a)
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Answers & Comments
Verified answer
2).а) (x - y)*(*) = xa - ya
(*) = (xa - ya)/(x - y) = a(x - y)/(x - y) = a
б) (*)*(2b - 3c) = 2bm - 3cm
(*) = (2bm - 3cm)/(2b - 3c) = m(2b - 3c)/(2b - 3c) = m
в) (2x - y + 3zx)*(*) = -2x²a² + ya²x - 3za²x²
(*) = -a²x(2x - y + 3zx)/(2x - y + 3zx) = -a²x
д) (3x - 4y)(4x + 3y) - (4x - 3y)(3x + 4y) =
= 12x² - 16xy + 9xy - 12y² - 12x² - 16xy + 9xy + 12y² =
= -32xy + 18xy = -14xy
e) (2b + a³)(a² - 2b) - (a² + 2b)(a³ - 2b) =
= 2a²b + a⁵ - 4b² - 2a³b - a⁵ + 2a²b - 2a³b + 4b² =
= 4a²b - 4a³b = 4a²b(1 - a)