Предмет: Алгебра, автор: kirnov98

Решите уравнение -x^2-5x+14=0 

Ответы

Автор ответа: mqritim
0
Умножаем уравнение на (-1) получаем
x^2+5x-14=0
Д=25+4*14=25+54=79
х1=((-5)+КОРЕНЬ79)/2
х2=((-5)-КОРЕНЬ79)/2
Автор ответа: mqritim
0
Ой извините не правильно писчитал...:( Дискриминант равне 81
Автор ответа: mqritim
0
х1=-5+9/2=4 х2= -5-9/2=-7
Автор ответа: kirnov98
0
неправильно. x1=-5+9/2=4/2=2
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