Question 984279
{{{2log(2,y)-4log(2,x)=4}}}


{{{log(2,(y^2))-log(2,(x^4))=2^2}}}


{{{log(2,(y^2/x^4))=2^2=4}}}


{{{2^4=(y^2/x^4)}}}


{{{16=y^2/x^4}}}


{{{16x^4=y^2}}}


{{{x^4=y^2/16}}}, all even powers


{{{highlight(x=0+- sqrt(y)/2)}}}