Question

x^3-216=0

Answer 1

this is difference of two cubes
\[\huge \implies x^3 - 6^3\]
and the formula is
\[\huge a^3 - b^3 = (a-b)(a^2 + ab + b^2)\]
does that help?

Answer 2

or
\[x=\sqrt[3]{216}\]

Answer 3

that works too...