Question

IF (x+1/x)=8 and (x-1/x) =(-8) then(x^2-1/x^2)=?

Answer 1

Answer:

66

Step-by-step explanation:

by squaring

=(x+1/x)^2

by using identity (a-b)^2 = a^2+b^2+2ab

( x+1/x)^2 = x^2 +1/x^2+2*x*1/x

=(8)^2+2

=64+2

(x+1/x )^2 =66