Выберите систему уравнений, решением который является пара чисел (-1.2)

1)

2)\left \{ {{(-1)^{2}+3*2^{2}=13 } \atop {-1+3*2=5}} \right. =>\left \{ {{13=13} \atop {5=5}} \right. =>(+)" class="latex-formula" id="TexFormula2" src="https://tex.z-dn.net/?f=%5Cleft%20%5C%7B%20%7B%7Bx%5E%7B2%7D%2B3y%5E%7B2%7D%3D13%20%20%7D%20%5Catop%20%7Bx%2B3y%3D5%7D%7D%20%5Cright.%20%3D%3E%5Cleft%20%5C%7B%20%7B%7B%28-1%29%5E%7B2%7D%2B3%2A2%5E%7B2%7D%3D13%20%20%7D%20%5Catop%20%7B-1%2B3%2A2%3D5%7D%7D%20%5Cright.%20%3D%3E%5Cleft%20%5C%7B%20%7B%7B13%3D13%7D%20%5Catop%20%7B5%3D5%7D%7D%20%5Cright.%20%3D%3E%28%2B%29" title="\left \{ {{x^{2}+3y^{2}=13 } \atop {x+3y=5}} \right. =>\left \{ {{(-1)^{2}+3*2^{2}=13 } \atop {-1+3*2=5}} \right. =>\left \{ {{13=13} \atop {5=5}} \right. =>(+)">

3)

4)\left \{ {{-1-2=1} \atop {(-1-1)(2+2)=2}} \right. =>\left \{ {{-3=1} \atop {-8=2}} \right. =>(-)" class="latex-formula" id="TexFormula4" src="https://tex.z-dn.net/?f=%5Cleft%20%5C%7B%20%7B%7Bx-y%3D1%7D%20%5Catop%20%7B%28x-1%29%28y%2B2%29%3D2%7D%7D%20%5Cright.%20%3D%3E%5Cleft%20%5C%7B%20%7B%7B-1-2%3D1%7D%20%5Catop%20%7B%28-1-1%29%282%2B2%29%3D2%7D%7D%20%5Cright.%20%3D%3E%5Cleft%20%5C%7B%20%7B%7B-3%3D1%7D%20%5Catop%20%7B-8%3D2%7D%7D%20%5Cright.%20%3D%3E%28-%29" title="\left \{ {{x-y=1} \atop {(x-1)(y+2)=2}} \right. =>\left \{ {{-1-2=1} \atop {(-1-1)(2+2)=2}} \right. =>\left \{ {{-3=1} \atop {-8=2}} \right. =>(-)">

ответ:2