Решить уравнение x^2=4x

[latex] x^{2} =4x[/latex] [latex] x^{2} -4x=0[/latex] [latex]x(x-4)=0[/latex] [latex] \left \{ {{x=0} \atop {x-4=0}} \right. [/latex] [latex] \left \{ {{x=0} \atop {x=4}} \right. [/latex]