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Цветик1111
@Цветик1111
July 2022
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решите систему неравенства
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dustInEyes
Verified answer
21х²+39х-6<0 |:3
7х²+13х-2<0
Д=169+56=225=15²
х1=(-13+15)/14=2/14=1/7
х2=(-13-15)/14=-28/14=-2
х>0
-2 0 ///////1/7
-----|--------|-------|--------
/////////////////
Ответ х∈(0: 1/7)
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Answers & Comments
Verified answer
21х²+39х-6<0 |:37х²+13х-2<0
Д=169+56=225=15²
х1=(-13+15)/14=2/14=1/7
х2=(-13-15)/14=-28/14=-2
х>0
-2 0 ///////1/7
-----|--------|-------|--------
/////////////////
Ответ х∈(0: 1/7)