Question

if x-1/x=13, find the value of x^2+1/x^2​

Answer 1

Answer:

145

Step-by-step explanation:

x-1/x=13

x-1=13x

12x=-1

x=-1/12

x^2+1/x^2

(-1/12)^2+1/(-1/12)^2

1/144 +1/ 1/144

145/144/1/144

=145

Answer 2

Answer:

171

Step-by-step explanation:

x-1/x=13

(x-1/x)²=13²

x²-(2×x×1/x)+1/x²=169

x²+1/x²-2=169

x²+1/x²=169+2

x²+1/x²=171...