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Keska222
@Keska222
September 2021
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Решите неравенство x^2 - 49 < 0. ПоЖАЛУЙСТА БЫСТРЕЕ
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Эксперт5
Verified answer
X²-49<0
x²-7²<0
(x-7)(x+7)<0
+ - +
___________-7___________7_________
x∈(-7;7)
0 votes
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Keska222
спасябон
Kixcertborn2
Verified answer
x^2 - 49 < 0
(x-7)*(X+7)<0
{ X-7<0
{ X+7>0
{ X-7>0
{ X+7<0
{ X<7
{ X>-7
{ X>7
{ X<-7
X
∈(-7,7)
X
∈∅
Ответ: x
∈(-7,7)
0 votes
Thanks 0
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Answers & Comments
Verified answer
X²-49<0x²-7²<0
(x-7)(x+7)<0
+ - +
___________-7___________7_________
x∈(-7;7)
Verified answer
x^2 - 49 < 0(x-7)*(X+7)<0
{ X-7<0
{ X+7>0
{ X-7>0
{ X+7<0
{ X<7
{ X>-7
{ X>7
{ X<-7
X∈(-7,7)
X∈∅
Ответ: x∈(-7,7)