Question

x+3x=0
$x {}^{2} + 3x= 0$
​

Answer 1

X+3x=0

Acho q é isso

Answer 2

x + 3x = 0

4x = 0

x= 0/4

x= 0

x² + 3x = 0

x • (x + 3) = 0

x= 0

x + 3 = 0

x= 0 - 3

x= - 3

S= ( 0 , - 3)