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julia445
@julia445
August 2022
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решите уровнение x^4-25x^2+144=0
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olga192
Пусть х^2=t, тогда t^2-25t=144=0
Находим Д=25^2-4*1*144=49
х1=(25+7)/2=16
х2=(25-7)/2=9
х1=корень из 16=+/- 4
х2=корень из 9=+/-3
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Answers & Comments
Находим Д=25^2-4*1*144=49
х1=(25+7)/2=16
х2=(25-7)/2=9
х1=корень из 16=+/- 4
х2=корень из 9=+/-3