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Polina47K
@Polina47K
July 2022
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2x в квадрате + 5x - 7 = 0
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YaK67
Дискриминант = 25-4*2*(-7)=81
х=(-5+-9)/4
х1=1
х2=-3,5
6 votes
Thanks 8
Polina47K
спасибо
igir12370
исправь, пока не отметили, как нарушение
igir12370
2х²+5х-7=0
D=25+56=81
х1=(-5+9)/4=1
х2=(-5-9)/4=-3,5
ответ; -3,5; 1
5 votes
Thanks 15
Polina47K
спасибо
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Answers & Comments
х=(-5+-9)/4
х1=1
х2=-3,5
D=25+56=81
х1=(-5+9)/4=1
х2=(-5-9)/4=-3,5
ответ; -3,5; 1