Question 876799
You use a similar substitution, {{{u=x^(3/4)}}}, {{{u^2=(x^(3/4))^2=x^(3/2)}}}
{{{u^2-2u+1=0}}}
{{{(u-1)^2=0}}}
{{{u-1=0}}}
{{{u=1}}}
{{{x^(3/4)=1}}}
{{{x=1}}}