Question

If x= 5-√21 /2 prove that (x^3 + 3) - 5 (x^2 + 1/x^2) + (x + 1/x) = 0​

Answer 1

Answer:

5-√21 /2 prove that (x^3 + 3) - 5 (x^2 + 1/x^2) + (x + 1/x) = 0