Решите систему уравнений: x+y=5 x^2-3y= -15. Created by KPine. algebra-ru

Решите систему уравнений: x+y=5 x^2-3y= -15...

June 2022 1 37 Report

Решите систему уравнений: x+y=5 x^2-3y= -15

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pikosteadygirl1 X+y=5
x^2-3y+15=0;

x=5-y
(5-y)^2-3y+15=0

x=5-y
25-10y+y^2-3y+15=0

x=5-y
y^2-13y+40=0

x=5-y
(y-5)(y-8)=0
y=5, y=8;
x=5-5=0
x=5-8=-3

7 votes Thanks 16

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