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brabrainly
@brabrainly
July 2022
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Решите пожалуйста срооочно
Хотя бы 2,3
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LonelyLife
3 задание
2x+3-x^2=0
D=4-4×(-1)×3=16
x(1)=2÷-2=-1
x(2)=-6÷-2=-3
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brabrainly
а дальше? ответ?
LonelyLife
2x+3-x^2=0
D=4-4×(-1)×3=16
x(1)=2÷-2<-1
x(2)=-6÷-2<3
LonelyLife
Ответ: от минус бесконечности до -1; от 3 до плюс бесконечности (в круглых скобках)
LonelyLife
Не обратил внимание на знак меньше
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Answers & Comments
2x+3-x^2=0
D=4-4×(-1)×3=16
x(1)=2÷-2=-1
x(2)=-6÷-2=-3
D=4-4×(-1)×3=16
x(1)=2÷-2<-1
x(2)=-6÷-2<3