Question 645507

{{{8y^3-64=0}}}

{{{8y^3=64}}}

{{{y^3=64/8}}}

{{{y^3=8}}}

{{{y=root(3,8)}}}

{{{y=root(3,2^3)}}}

{{{y=root(cross(3),2^cross(3))}}}

{{{y=2}}}