polynomial equations

[radiant glacier]

Great you proved that 0 isn't a solution.
Now, take z as a number and get u = z-1/z. Then you need to proceed to do operations with z. You should get: u2 + 2u - 5 - 2z/z-1 + z2/(z-1)2
Make sure to understand that u is a different way of writing z, so we can use it instead of z. Lastly, we want to find out which numbers will make this question equal zero.

[hybrid plank]

i found that we can write P as u^2+2u-7

then i calculated the answer for U

but the answers are real

and i need them to be in C

i think i calculated the solutions for U