Question 995493
{{{(x-4)^ 4-80 = 0}}}<--->{{{(x-4)^ 4 = 80}}}<--->{{{system(x-4=root(4,80),"or",x-4=-root(4,80))}}}<--->{{{x=4 +- root(4,80)=4 +- 2root(4,5)}}}