Question

simplify the expression Please?

z^2(z^4-z^2)+4z^3(z+1)

Answer 1

\[\Huge z^6+3 z^4+4 z^3 \]

Answer 2

z^6 -z^4 +4z^4 +4z^3
z^6 +4z^4 +4z^3

Answer 3

z^6+3z^4+4z^3