Предмет: Алгебра, автор: fortuna7formi

Решите пожалуйста систему уравнений ПОДРОБНО!
x^2+2x+y^2=16
x+y=2

Ответы

Автор ответа: Vlaimir
1
y=2-x
Подставим в первое
x^2+2x+4-4x+x^2=16
2x^2-2x-12=0
x^2-x-6=0
D=1+24 = 25
x=(1+-5)/2
x=3  x =-2
тогда y равняется
y=-1  y= 4 

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