Question

решите уравнение (x-6)^2+ ly+2l^2= 0

Answer 1

$(x-6)^2+|y+2|^2=0\\(x-6)^2+(y+2)^2=0\\ \left \{ {{y+2=0} \atop {x-6=0}} \right. \\x=6\\y=-2$