October 2021 0 8 Report
Пусть D - дискриминант квадратного трехчлена ax^2+bx+c. Имеет ли уравнение корни и каковы их знаки,если : а) D>0, a<0, b<0,c>0;
б) a<0, c>0;
в) 0
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