Respuesta :

Answer:

[tex]3y - y^4[/tex]

Step-by-step explanation

[tex]y(3 - y ^3)[/tex]

distribute the y

[tex]3 * y -y * y^3[/tex]

simplify

[tex]3y - y^4[/tex]

Answer:

Step-by-step explanation:

y(3y)-y(y^3)

3y^2- y^4