How to prove a number is algebraic?

160 Views Asked by At

Show that $\sqrt[3]{\sqrt 3+2} +4$ is an algebraic number

1

There are 1 best solutions below

0
On BEST ANSWER

Standard method: set $x=\sqrt[3]{\sqrt{3}+2}+4$. Now compute $(x-4)^3=\sqrt{3}+2$. So $[(x-4)^3-2]^2=3$ and you're done.