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Lena502000
@Lena502000
June 2022
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Выполните умножение: 1) (х+3)(х^2-х-1)=
2) 5(х+2)(х+3)
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nKrynka
Решение
1) (x + 3)*(x² - x - 1) = x³ - x² - x + 3x² - 3x - 3 = x³ + 2x² - 4x - 3
2) 5*(x + 2)*(x + 3) = 5x² + 30 + 15x + 10x = 5x² + 25x + 30
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Lena502000
Спасибооо БОЛЬШОЕ
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Answers & Comments
1) (x + 3)*(x² - x - 1) = x³ - x² - x + 3x² - 3x - 3 = x³ + 2x² - 4x - 3
2) 5*(x + 2)*(x + 3) = 5x² + 30 + 15x + 10x = 5x² + 25x + 30