Answer: [tex]84x^{12}[/tex]
Step-by-step explanation:
The given expression : [tex](4x)(-3x^8) (-7x^3)[/tex]
Open brackets, we get
[tex]4x\cdot-3x^8\cdot-7x^3\\\\=4\cdot-3\cdot-7\cdot x\cdot x^8\cdot x^3[/tex]
Using law of exponents:-
[tex]a^m\cdot a^n=a^{m+n][/tex]
[tex]84\cdot x^{1+8+3}\\\\=84x^{12}[/tex]
Hence, the product [tex](4x)(-3x^8) (-7x^3)=84x^{12}[/tex]
