Предмет: Алгебра, автор: Аноним

Решите уравнение (3х+1)(х-4)=х^2+3х-4 если корней несколько найдите их среднее арифметическое

Ответы

Автор ответа: leeenaaa

3x^2-12x+x-4-x^2-3x+4=0
2x^2-14x=0
2x(x-7)=0
Или 2x=0, x=0,
Или x-7=0, x=7
Среднее арифметическое (0+7)/2=3,5

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