The solutions of the second-order ODE $x^{2} \frac{d^{2} y}{d x^{2}}-3 x \frac{d y}{d x}=0$ is Select one a. $y=c_{1}+c_{2} x^{3}$ b. $y=c_{1}+c_{2} x^{4}$ C $y=c_{1}+c_{2} e^{3 x}$ d Nonegrithese CS.VS. 1386