Question

IF X=√5√4 THEN FIND THE VALUE OF X-1/X

Answer 1

Given, x - 1x = 5 Squaring both sides, (x - 1x )^2 = 5^2 (x - 1x )^2 = 25 x^2 + 1x^2 - 2 × x × 1x = 25 a - b)^2 = a^2 - 2ab + b^2 x^2 + 1x^2