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# How to solve this algebra problem without a calculator? Watch

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2. (Original post by Kurraiyo)

3. (Original post by Kurraiyo)
The second power of a+1/a or a-1/a differ from a^2+1/a^2 or a^21/a^2 in a constant only

So

Similarly as

so

4. I can feel one of my heads coming on...
5. (Original post by ztibor)
The second power of a+1/a or a-1/a differ from a^2+1/a^2 or a^21/a^2 in a constant only

So

Similarly as

so

(Original post by BabyMaths)

Thank you!!
6. Bump, another similar question I'm stuck on.
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7. (Original post by Kurraiyo)
Bump, another similar question I'm stuck on.
You can expand .

The left side simplifies nicely using the fact that .
8. (Original post by BabyMaths)
You can expand .

The left side simplifies nicely using the fact that .
Thanks again you're a lifesaver
9. (Original post by Kurraiyo)
Thanks again you're a lifesaver

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