Question

How to find a-1/a from a+1/a

Answer 1

a-1/a=5……………(1)

Formula :-

(a+1/a)^2-(a-1/a)^2=4…………..(2)

(a+1/a)^2-(5)^2=4

(a+1/a)^2=29

(a+1/a)=+/-(29)^1/2

Now a^2–1/a^2 =?

a^2–1/a^2=(a+1/a)(a-1/a)

= ( +/- 29^1/2)(5)

=+/-5.(29)^1/2 , Answer