Answer: [tex]2z^{2} + 14 z +6[/tex] and [tex]2(z^{2} + 7 z +3)[/tex]
Step-by-step explanation:
We have the following expression:
[tex]z+(z+6)z+(z+6)z+(z+6)[/tex]
Let's solve it:
[tex]z+z^{2}+6z+z^{2}+6z+z+6[/tex]
We have this result:
[tex]2z^{2} + 14 z +6[/tex]
However if we apply coomon factor 2, we will have a simplified result:
[tex]2(z^{2} + 7 z +3)[/tex]
