Answer
$-216x^6$
Work Step by Step
RECALL:
(1) $(ab)^m=a^mb^m$
(2) $(a^m)^n=a^{mn}$
Use rule (1) above to obtain:
$=(-6)^3(x^2)^3
\\=-6(-6)(-6)(x^2)^3
\\=-216(x^2)^3$
Use rule (2) above to obtain:
$=-216(x^{2(3)})
\\=-216x^6$