Step-by-step explanation:
[tex] \frac{4 {x}^{2} + 36 }{4x} . \frac{1}{5x} \\ \\ = \frac{4( {x}^{2} + 9)}{4x} . \frac{1}{5x} \\ \\ = \frac{( {x}^{2} + 9)}{x.5x} \\ \\ = \frac{ {x}^{2} + 9 }{5 {x}^{2} } \\ \\ = \frac{ {x}^{2} }{5 {x}^{2} } + \frac{9}{5 {x}^{2} } \\ \\ = \frac{1}{5} + \frac{9}{5 {x}^{2} } \\ [/tex]
