График построен на рисунке снизу
Arctg(|x|)=pi/6
|x|=tg(pi/6)
|x|=√3/3
x=√3/3
x=-√3/3
1) {y=6-x; x^2+3x-22=0 D=9+22*4=97; x1,2=(-3<span>±sqrt97)/2
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| { x=(-3+sqrt97)/2; y=6-(-3+sqrt97)/2
|_{x=(-3-sqrt97)/2; y=6-(-3-sqrt97)/2
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| { x=(-3+sqrt97)/2; y=(15+sqrt97)/2
|_{x=(-3-sqrt97)/2; y=(15-sqrt97)/2
2) {x^2-2y^2+x^2+2y^2=12-4; x^2-2y^2=-4
{2x^2=8; x^2-2y^2=-4
{x^2=4; x^2-2y^2=-4
{x=±2; x^2-2y^2=-4
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| {x=2; 4-2y^2+4=0
|_{x=-2; 4-2y^2+4=0
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| {x=2; -2y^2=-8
|_{x=-2; -2y^2=-8
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| {x=2; y^2=4
|_{x=-2; y^2=4
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| {x=2; y=±2
|_{x=-2; y=±2