81a²-25 would be the answer I'm pretty sure. Hopefully I helped.
<em>Hey, the answer is pretty simple. It is </em><em>81a²-25</em>
<em>I hope I helped you. I will be really happy, If you mark my answer as the brainliest.Your David.</em>
Answer:
I think it might be 56 degrees
Answer: d 10900
Step-by-step explanation: