x^{2} +4x=-4 \\ x^{2} +4x+4=0 \\ (x+2)^2=0 \\ x=-2 \\ 4*(-2)+2y=-3 \\ 2y=5 \\ y=2,5 \\ (-2;2,5)" alt=" +\left \{ {{ x^{2} -2y=-1} \atop {4x+2y=-3}} \right. => x^{2} +4x=-4 \\ x^{2} +4x+4=0 \\ (x+2)^2=0 \\ x=-2 \\ 4*(-2)+2y=-3 \\ 2y=5 \\ y=2,5 \\ (-2;2,5)" align="absmiddle" class="latex-formula">
