Respuesta :
Answer:
-13k^3+ 4k^2
Explanation:
You subtract -4k^3 from 9k^3 the common exponents and you leave the 4k^2 alone
-13k^3+ 4k^2
Explanation:
You subtract -4k^3 from 9k^3 the common exponents and you leave the 4k^2 alone