SOLUTION: how do i get from this step to this step I dont understand how they got from step 1 to 2
1) z to the 4th power + z to the second power + 1
2) z to the 4th power + 2z to the sec
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Question 704871: how do i get from this step to this step I dont understand how they got from step 1 to 2
1) z to the 4th power + z to the second power + 1
2) z to the 4th power + 2z to the second power + 1 - z to the second power
Dont unserstand how they get from 1) to 2)
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
The only thing you can add to something and not change the value of the original expression is zero.
But 
, so replace the zero with 
Then collect like terms:
John
Egw to Beta kai to Sigma
My calculator said it, I believe it, that settles it
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