Answer:
a) [tex]x(x+3)[/tex]
b) [tex]2x(x-8)[/tex]
c) [tex]3x(2+3x^{2})[/tex]
d) [tex]4x^{2} (3x-1)[/tex]
Step-by-step explanation:
a) [tex]x^{2} +3x=x(x+3)[/tex]
b) [tex]2x^{2} -8x=2x(x-8)[/tex]
c) [tex]6x+9x^{3} =3x(2+3x^{2})[/tex]
d) [tex]12x^{3} -4x^{2} =4x^{2} (3x-1)[/tex]