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Fetesh
@Fetesh
July 2022
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сократить дробь x^2 - 6x - 7 / 3x - 21
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aln20162016
Решим квадратное уравнение x^2-6x-7=0. Получим: х1=7. х2=-1. Тогда x^2-6x-7=(x+1)(x-7). В знаменателе вынесем за скобку 3, получим 3(х-7). Сократив дробь на (х-7), получим: (х+1)/3.
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