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grishkovanyush
@grishkovanyush
September 2021
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Задание на фото, объясните как решать
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ssoxo
-х-36/(х+5)=-8,
-х(х+5)-36=-8(х+5),
-х²-5х-36=-8х-40,
х²-3х-4=0,
D=b²-4ac=(-3)²-4·1·(-4)=9+16=25,
х₁,₂=-b+-√D/2a,
х₁=(3-5)/2=-1,
х₂=(3+5)/2=4 - это ответ.
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Answers & Comments
-х(х+5)-36=-8(х+5),
-х²-5х-36=-8х-40,
х²-3х-4=0,
D=b²-4ac=(-3)²-4·1·(-4)=9+16=25,
х₁,₂=-b+-√D/2a,
х₁=(3-5)/2=-1,
х₂=(3+5)/2=4 - это ответ.