Question

(x/4+4x/5) ^3 expansion ​

Answer 1

Did you mean

${( \frac{x}{4} + \frac{4x}{5} )}^{3}$

If yes then your answer is

$\huge \pink {Simplifying}$

${( \frac{x}{4} + \frac{4x}{5} )}^{3} \\ = {( \frac{5x + 16x}{20} )}^{3} \\ = {( \frac{21x}{20} )}^{3} \: \: \: \: \: \: \: \: \: \: \\ \frac{9261}{8000}$

now can't be simplified further

hope my Answer may help you...

please do follo me