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VovanychMiner
@VovanychMiner
July 2022
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х в квадрате меньше -2х+63 решите неравентво
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Banabanana
Verified answer
Х² < -2x + 63
x² + 2x - 63 < 0
находим нули:
x² + 2x - 63 = 0
D = 4 + 252 = 256 = 16²
x₁ = (-2-16)/2 = -9
x₂ = (-2+16)/2 = 7
отмечаем на числовой прямой, записываем ответ:
+ - +
---------(-9)---------------(7)----------->
x ∈ (-9; 7)
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Answers & Comments
Verified answer
Х² < -2x + 63x² + 2x - 63 < 0
находим нули:
x² + 2x - 63 = 0
D = 4 + 252 = 256 = 16²
x₁ = (-2-16)/2 = -9
x₂ = (-2+16)/2 = 7
отмечаем на числовой прямой, записываем ответ:
+ - +
---------(-9)---------------(7)----------->
x ∈ (-9; 7)