[latex] \left \{ {{ x^{2} + y^{2} -6y=0}\atop{y+2=0}} \right. [/latex] Помогите решить систему уравнения

[latex] \left \{ {{ x^{2} + y^{2} -6y=0}\atop{y+2=0}} \right. \\ \left \{ {{ x^{2} + (-2)^{2} -6*(-2)=0}\atop{y=-2}} \right. \\ \left \{ {{ x^{2} + 4 +12=0}\atop{y=-2}} \right. \\ \left \{ {{ x^{2} + 16=0}\atop{y=-2}} \right. \\ \left \{ {{ x^{2} =-16}\atop{y=-2}} \right. \\ \left \{ \left \{ {{x_1=-4i} \atop {y=-2}} \right. } \atop {\left \{ {{x_2=4i} \atop {y_2=-2}} }} \right. [/latex] Ответ: x=-4i y= -2 и х=4і у=-2