SOLUTION: 2y^6 - 128

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Question 351646: 2y^6 - 128
Found 2 solutions by ewatrrr, solver91311:
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
Hi,
If I am understanding the question properly
2%2Ay%5E6+-128+=+0
.
2%2Ay%5E6+=+128
.
y%5E6+=+64
.
y+=+root%286%2C+64%29
y = 2

Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


Presumeably you want a complete factorization of this 6th degree polynomial expression.

Let .

Then



Take out a 2:



Factor the quadratic binomial:



Replace the substitution:



Use the sum and difference of cubes factorization:



If you are factoring over , then you are done. If you need to factor over , then continue using the quadratic formula to determine the four complex factors (verification left as an exercise for the student):



Ending with 6 binomial factors as the Fundamental Theorem of Algebra guarantees for a 6th degree polynomial.

John

My calculator said it, I believe it, that settles it
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