Answer:
[tex]2a^3+2a^2b^2-6a^2z-3ab^2-3b^4+9b^2z[/tex]
Step-by-step explanation:
[tex](2a^2-3b^2)(a+b^2-3z)[/tex]
Start by distributing the [tex]2a^2[/tex] into all of the terms in between the second parentheses.
[tex]2a^3+2a^2b^2-6a^2z[/tex]
Next, distribute the [tex]-3b^2[/tex] into all of the terms in between the second parentheses.
[tex]-3ab^2-3b^4+9b^2z[/tex]
For the sake of simpler interpretation, I separated the two above, but they are together:
[tex]2a^3+2a^2b^2-6a^2z-3ab^2-3b^4+9b^2z[/tex]
Since the terms are already in descending order, we do not need to rearrange them.