Question

Need a bit of help on the question please

Answer 1

Remember
∛(mn)=(∛m)(∛n)
and
if you have the 3rd root of a negative number, the root will be negative

∛-216=(∛216)(∛-1)
we know that 216=6^3 (you know, just fun fact)
6(∛-1)
3rd root of -1 is -1 ((-1)^3=-1)
6(-1)
-6

Answer 2

Hello,

as 6^3=6*6*6=216
∛(-216)=-6