tex] ...

August 2022 1 13 Report

Решить систему уравнений способом подстановки
[tex]\left \{ {{ x^{2} +2y=5} \atop {y-x=1}} \right. [/tex]

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Angel0408 X^2+2y=5
y=1+x

x^2+2*(1+x)-5=0
y=1+x

x^2+2+2x-5=0
x^2+2x-3=0
D1=(2*2)^2-1*(-3)=1+3=4
x1=-1-2, x2=-1+2
x1=-3, x2=1

x1=-3, x2=1
y1=1-3, y2=1+1

x1=-3, x2=1
y1=-2 y2=2

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