Question

If x=3+√8, find x^2 - 1/x^2

Answer 1

1/x=3-8^1/2

x^2-1/x^2

=(3+8^1/2)^2 - (3-8^1/2)^2

=4×(3+8^1/2)× (3-8^1/2)

=4×1

=4 (answer)

Answer 2

Here is your answer dude