Question

If (a+1/a) = 7 and (a-1/a) =3 than a^2-1/a^2 is :​

Answer 1

Step-by-step explanation:

we know that :-

a²-b² = (a+b)(a-b)

= a²-1/a² = (a+1/a)(a-1/a)

= a²-1/a² = (7)(3) = 21 { ANSWER }

I HOPE YOU ARE CLEAR NOW.