the first step to simplify this equation is to multiply the numbers
1512[tex] x^{4} [/tex]×[tex] x^{7} [/tex]
next,, youll multiply the terms with the same base by adding their exponents
1512[tex] x^{4+7} [/tex]
finally,, youll add the numbers together
1512[tex] x^{11} [/tex]
since you cant simplify any further,, the correct answer to your question is 1512[tex] x^{11} [/tex]
let me know if you have any further questions
:)