Answer:
Step-by-step explanation:
[tex]\frac{4x^{2}}{12x^{2}-4}=\frac{4x^{2}}{4*3*x^{2}-4}\\\\=\frac{4x^{2}}{4*[3x^{2}-1]}\\\\=\frac{x^{2}}{3x^{2}-1}[/tex]
