simply using only positive exponents

Question

-3x^-3

Answer 1

-3x^-3

 

Express in only positive exponent;

 

Remember x^-1 = 1/x

 

so x^-3 = 1/x³

 

so now sub x^-3 in your equation

 

-3(1/x³)

 

-3/x³

Answer 2

This is -3/x^3.