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Evengina
@Evengina
October 2021
1
13
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срочно решите неравенства:
1. -9х - 7 < 7х
2. х в квадрате - 4х - 12 < 0
3. х в квадр - 32х меньшеилиравно 0
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GREENDEY
1) -9х - 7 < 7х
-9х - 7х < 7
-16х < 7 | : (-16)
х > - 7/16
2). х² - 4х - 12 < 0
(х - 6) (х + 2)
< 0
+ +
_________________-2_____________________6_____________
-
Ответ: ( -2 ; 6 )
3). х² - 32х ≤ 0
x(x - 32)
≤ 0
+ +
_________________0_____________________32_____________
-
Ответ: [ 0 ; 32 ]
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Thanks 2
Evengina
спасибо большое! жизнь спасли)
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Answers & Comments
-9х - 7х < 7
-16х < 7 | : (-16)
х > - 7/16
2). х² - 4х - 12 < 0
(х - 6) (х + 2) < 0
+ +
_________________-2_____________________6_____________
-
Ответ: ( -2 ; 6 )
3). х² - 32х ≤ 0
x(x - 32) ≤ 0
+ +
_________________0_____________________32_____________
-
Ответ: [ 0 ; 32 ]