Chapter 12.16, Problem 14P

Use (16.5) to write the solutions of the following problems. Remember that $x{\left(x{y}^{\prime }\right)}^{\prime }=x^2{y}^{\prime \prime }+x{y}^{\prime }$.

$x^2{y}^{\prime \prime }+x{y}^{\prime }+\left(4x^2-9\right)y=0$