Answer:
LEWIS
Step-by-step explanation:
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I think the writer of the problem made a mistake for the exponent of 12a :))
5.
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Answers & Comments
Answer:
LEWIS
Step-by-step explanation:
1.![(a+5)(a+2) = a^{2} + 7a+10 (a+5)(a+2) = a^{2} + 7a+10](https://tex.z-dn.net/?f=%28a%2B5%29%28a%2B2%29%20%3D%20a%5E%7B2%7D%20%2B%207a%2B10)
2.![(a+8)^{2} =a^{2} +16a+64 (a+8)^{2} =a^{2} +16a+64](https://tex.z-dn.net/?f=%28a%2B8%29%5E%7B2%7D%20%3Da%5E%7B2%7D%20%2B16a%2B64)
3.![(a+5)+(a-3)=a^{2} +2a-15 (a+5)+(a-3)=a^{2} +2a-15](https://tex.z-dn.net/?f=%28a%2B5%29%2B%28a-3%29%3Da%5E%7B2%7D%20%2B2a-15)
4.![(2a+1)^{3} = 8a^{3}+12a^{2}+6a+1 (2a+1)^{3} = 8a^{3}+12a^{2}+6a+1](https://tex.z-dn.net/?f=%282a%2B1%29%5E%7B3%7D%20%3D%208a%5E%7B3%7D%2B12a%5E%7B2%7D%2B6a%2B1)
I think the writer of the problem made a mistake for the exponent of 12a :))
5.![(a+1)(a^{2}+2a+3)=a^{3}+3a^{2}+5a+3 (a+1)(a^{2}+2a+3)=a^{3}+3a^{2}+5a+3](https://tex.z-dn.net/?f=%28a%2B1%29%28a%5E%7B2%7D%2B2a%2B3%29%3Da%5E%7B3%7D%2B3a%5E%7B2%7D%2B5a%2B3)