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nurdias05
@nurdias05
November 2021
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сделайте 2-3 только ответ правильный
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regina12022
Verified answer
1) х²-5х-6=0
Д=5²-4*1*(-6)=25+24=49
х₁=(5+√49)/2*1=(5+7)/2=12:2=6
х₂=(5-√49)/(2*1)=(5-7)/2=-2:2=-1
Ответ:(-1; 6)
2) 2х-4/7=0
14х-4=0
14х=4
х=4:14
х=4/14=2/7
Ответ: 2/7
1 votes
Thanks 1
nurdias05
хорош,помог
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Answers & Comments
Verified answer
1) х²-5х-6=0Д=5²-4*1*(-6)=25+24=49
х₁=(5+√49)/2*1=(5+7)/2=12:2=6
х₂=(5-√49)/(2*1)=(5-7)/2=-2:2=-1
Ответ:(-1; 6)
2) 2х-4/7=0
14х-4=0
14х=4
х=4:14
х=4/14=2/7
Ответ: 2/7