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July 2022
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(x-5)(x+3)>0 решить методом интервалов
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Grdn
X^2 + 3x - 5x - 15 > 0
x^2 - 2x - 15 > 0
D = 4 + 60 = 64
x1 = (2 - 8)/2 = -3
x2 = (2 + 8)/2 = 5
--(+)--(-3)--(-)--(5)--(+)-->
Ответ: (-∞;-3)(5;+∞)
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Answers & Comments
x^2 - 2x - 15 > 0
D = 4 + 60 = 64
x1 = (2 - 8)/2 = -3
x2 = (2 + 8)/2 = 5
--(+)--(-3)--(-)--(5)--(+)-->
Ответ: (-∞;-3)(5;+∞)