Предмет: Алгебра, автор: AgEnTwix007

Один из корней уравнения x^2-7x+a=0 равен 4.
Найдите другой корень.

Ответы

Автор ответа: CVita
0
нам дано приведенное квадратное уравнение. вспоминаем теорему Виетта.
x₁+x₂=-p
x₁*x₂=q
x₁=4
4+x₂=7
x₂=7-4
x₂=3

a=q=4*3=12
a=12
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