Divide: 3xx2−4÷9x2x+2\frac{3x}{x^2-4} \div \frac{9x^2}{x+2}x2−43x÷x+29x2.
13x(x−2)\frac{1}{3x(x-2)}3x(x−2)1
13x(x+2)\frac{1}{3x(x+2)}3x(x+2)1
3xx−2\frac{3x}{x-2}x−23x
x−23x\frac{x-2}{3x}3xx−2