Question

4x + 6$x^{2}$ = 0;

Answer 1

6x^2 + 4x = 0
x (6x + 4) = 0 

1) x = 0 ;

2) 6x + 4 = 0 
6x = - 4
x = - 2/3

Answer 2

4х+6х²=0,
2х(2+3х)=0,
х(2+3х)=0,
2+3х=0,    х=0.
х= $- frac{2}{3}$
Ответ: $- frac{2}{3}$; 0.