Answer:
distrubitive property a(b+c)=ab+ac
distributive property
a(b+c)=ab+ac
remember
(x^m)(x^n)=x^(m+n)
so
3x(x^2+4)=
(3x)(x^2)+(3x)(4)=
(3x^3)+(12x)=
3x^3+12x
(3x+2x) + 4
[tex]6 {x}^{2} + 4[/tex]
