Question

решите уравнение
3$x^{2}$ - 12х = 0

Answer 1

$3x^{2} - 12x=0; 3x(x-12)=0; \left \{ {3x=0} \atop {x-12=0}} \right; \left \{ {{x=0} \atop {x \neq 12}} \right.$

Answer 2

3х²-12х=0 (:3)
х²-4х=0
х(х-4)=0
х=0
х-4=0
х=4
   Ответ:  х1=0;  х2=4