Respuesta :

Answer:

[tex]3x^{2} +2x[/tex]

Step-by-step explanation:

Using the rainbow expansion method:

[tex]x(3x+2)=3x*x+x*2\\ = 3x^{2} +2x[/tex]

Answer:

3x² + 2x

Step-by-step explanation:

x (3x + 2)

= x*3x + x*2

= 3x² + 2x