Question 270927
{{{sqrt(x^2)=sqrt(100)}}} {{{highlight(10)}}}   

x^4 = 1 {{{highlight(1)}}} 1*1*1*1

{{{sqrt(x^2)=sqrt(0.25)}}}{{{highlight(0.05)}}}

x^4 = 16/81 this is the 4throot of 16 divided by the 4throot of 81
{{{2^4/3^4=16/81}}} so taking the 4th roots makes {{{highlight(x=2/3)}}}