Answer:
3x^2a^2+23x^2+176x+24xa^2-64
Step-by-step explanation:
First distrubute x+8
Distrubute x throught the parentheses in the first part
Distrube 8 to the other side
Combine like terms
and you would get
3x^2a^2+23x^2+176x+24xa^2-64
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