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Noooooooooob
@Noooooooooob
March 2023
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x²- (9 - x)² > -2x; помогите пожалуйста
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matilda17562
Verified answer
Ответ:
(4 1/20; + ∞)
Объяснение:
х² - (9 - x)² > - 2х
х² - (9² - 2•9•х + х²) > - 2х
х² - 81 + 18х - х² > - 2х
18х + 2х > 81
20х > 81
х > 81/20
х > 4 1/20
х є (4 1/20; + ∞)
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Answers & Comments
Verified answer
Ответ:(4 1/20; + ∞)
Объяснение:
х² - (9 - x)² > - 2х
х² - (9² - 2•9•х + х²) > - 2х
х² - 81 + 18х - х² > - 2х
18х + 2х > 81
20х > 81
х > 81/20
х > 4 1/20
х є (4 1/20; + ∞)