SOLUTION: If x=1+<2+<3 <=underroot Then what is the value of 2x^4-8x^3-5x^2+26x-28

Question 1026742: If x=1+<2+<3
<=underroot
Then what is the value of
2x^4-8x^3-5x^2+26x-28
Answer by KMST(5328) (Show Source): You can put this solution on YOUR website!
There must be a better trick. Let me know.
Maybe it is easier using synthetic division, but it did not sound so.
Here is my trick.
where

That is considerably simpler.

So substituting the expressiond found for and into
, we get

NOTE: Can someone please tell me what is the simpler way to the solution that I overlooked? I will be very, very grateful to whoever tells me.
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