Предмет: Алгебра, автор: alexeyivanovnk1234

Один из корней квадратного уравнения x^2-7x+a=0 равен 2. Найдите второй корень и коэффициент a

Ответы

Автор ответа: m11m

х²-7х+а=0
х₁=2
х₂-?
а-?
По т. Виета:
х₁+х₂=7 2+х₂=7 х₂=5
х₁*х₂=а 2*х₂=а 2*5=10=а
Ответ: х₂=5
а=10

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