Question

please it is too urgent if X + 1 by x is equal to 12 so find out X square + 1 by x square​

Answer 1

x+1/x=12

(x+1/x)^2=12^2=144

x^2 + 1/x^2 +2 × x × 1/x =144

therefore x^2+1/x^2=144-2=142