Please work me through the steps.

Answer:-6[tex]x^{12}[/tex]
Step-by-step explanation:
Open the brackets
-x is the same as -1x
(2[tex]x^{3}[/tex] x -[tex]x[/tex])(3[tex]x^{8}[/tex])
-2[tex]x^{4}[/tex] x 3[tex]x^{8}[/tex]
-6 [tex]x^{4} +x^{8}[/tex]
= -6[tex]x^{12}[/tex]