Answer
$16x^{18}$
Work Step by Step
RECALL:
(i) The products-to-powers rule states that: $(ab)^n=a^nb^n$
(ii) The power rule states that $(a^m)^n=a^{mn}$
Use the products-to-powers rule to find:
$=(-4)^2(x^9)^2
\\=16(x^9)^2$
Use the power rule to find:
$=16x^{9(2)}
\\=16x^{18}$
