Question

If (x-1/x)² =81,find the value of (x²+1/x²)​

Answer 1

Answer:

79

Step-by-step explanation:

(x- 1/x)²=81

x²+ 1/x²+2×x×1/x= 81

x²+ 1/x²+2=81

x²+ 1/x²=81-2

x²+ 1/x²=79

......666.........

Answer 2

Answer:

I hope that help you