text: y = cx^2/2 + c1   {c and c1 constants}\n\nLet z = y'.  Then z' = y''\nRewrite equation as:\nz' - (1/x)z = 0\nz' = z/x\nz'/z = 1/x\n\n∫ z'/z dx = ∫ 1/x dx\n∫ (1/z)(dz/dx)dx = ∫ 1/x dx\n∫ 1/z dz = ∫ 1/x dx\nln(z) = ln(x) + c0 {c0 constant}\nz = e^(c0)*x = cx \ny' = cx\ny = cx^2/2 + c1