Answer
$3x^{10}$
Work Step by Step
RECALL:
(i) $\dfrac{a^m}{a^n} = a^{m-n}. a \ne0$
Divide the coefficients by each other and the variables by each other to obtain:
$=\dfrac{6}{2} \cdot x^{2-(-8)}
\\=3 \cdot x^{2+8}
\\=3x^{10}$