SOLUTION: I know what I am supposed to do, and if I could find the LCD, I could solve the problem, but for the life of me, I am drawing a blank on how to factor (n^4 -1)

Question 94670: I know what I am supposed to do, and if I could find the LCD, I could solve the problem, but for the life of me, I am drawing a blank on how to factor (n^4 -1)
Answer by Earlsdon(6294) (Show Source): You can put this solution on YOUR website!
Factor:
Notice that , so now you can write:
The difference of two squares can be factored: Applying this to your problem:
but again, we have the difference of two squares in the second factor, so...
we would normally stop here, because the factors of involve the imaginary number
If you are interested though:
but don't use this if you have not yet come to imaginary numbers.

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