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goodcharlotte21
@goodcharlotte21
July 2022
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Решите квадратное неравенство:
-3x^2-6x+45 <0
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lena25073
Verified answer
Найдем Д
Д=36+4*3*45=576
х1=6+24/-6=-30/6=-5
х2=6-24/-6=18/6=3
отмечаем на числ. прямой
_____-5_____3
расставляем знаки
-+-
(- беск; -5) (3; +беск)
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Answers & Comments
Verified answer
Найдем ДД=36+4*3*45=576
х1=6+24/-6=-30/6=-5
х2=6-24/-6=18/6=3
отмечаем на числ. прямой
_____-5_____3
расставляем знаки
-+-
(- беск; -5) (3; +беск)