SOLUTION: if x=1+sqrt2+sqrt3,then find the value of 2x^4-8x^3-5x^2+26x-28

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Question 668861: if x=1+sqrt2+sqrt3,then find the value of 2x^4-8x^3-5x^2+26x-28
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

f(1+sqrt2+sqrt3) = f(4.1463)

f(4.1463)= 2x^4-8x^3-5x^2+26x-28 = 14.702