Simplify: 3x2+12xx2+8x+16\frac{3x^2 + 12x}{x^2 + 8x + 16}x2+8x+163x2+12x.
3xx+4\frac{3x}{x+4}x+43x
3x+4\frac{3}{x+4}x+43
3xx−4\frac{3x}{x-4}x−43x
x+43x\frac{x+4}{3x}3xx+4