Question

If x²+1/x²=6 then find the value of (I) x+1/x. (II) x-1/x​

Answer 1

Answer:

We know that

(A+B)²=A²+B²+2AB.

(X-1/X)²=2²

X²+1/X²=4+2

Therefore, we arrive at X²+1/X²=6

Hence, X-1/X=2