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

Algebra ->  Square-cubic-other-roots -> 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      Log On


   

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) About Me  (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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