Answer:
[tex]4x^2\left(3x-1\right)[/tex]
Key:
• [tex]a^{b+c}=a^ba^c[/tex]
• Factor out the last leading term standing to solve in the end.
Step-by-step explanation:
[tex]12x^3-4x^2\\x^3=xx^2\\=12xx^2-4x^2\\=4\cdot \:3xx^2-4\cdot \:1\cdot \:x^2\\=4x^2\left(3x-1\right)[/tex]