Математика 9 класс. Занятие 7. Исследование квадратного трёхчлена
Курсы Физтех-лицея им. П.Л. Капицы по математике для 9 класса.
Преподаватель: Герасимов Дмитрий Сергеевич
Телеграмм-канал курса:
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