Answer:
21 is a composite number
Step-by-step explanation:
It is a composite because multiple numbers can go in it like 3 and 7 so it is a composite number
1. x^2
2.k^10
3. 1
4.a^4 b
5.p^3 q^4
6.x^15 z
^ means to the power
u do 10 times 10 times 10 cuz its to the 3rd
=(a-b)(a^2+ab+b^2)
= a^3+a^2b+ab+ab^2-ba^2-ab^2-b^3
SIMPLIFY
=a^3+ab-b^3