Предмет: Математика, автор: vlad9933

Решите уравнение x в квадрате-х-20=0

Ответы

Автор ответа: Аноним
0
x^{2} -x-20=0\ D=1+80=81;\ x_{1} = frac{1-9}{2}=-4; x_{2}= frac{1+9}{2}=5
Автор ответа: Аноним
0
20o
Автор ответа: Аноним
0
20
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