Question

a-1/a = 2 then find a2 - 1/a2​

Answer 1

Step-by-step explanation:

here is your answer Hope it helps

Answer 2

Answer:

$a - \frac{1}{a} = 2 \\ \\( a - \frac{1}{a}) {}^{2} = {2}^{2} \\ \\ {a}^{2} + \frac{1}{ {a}^{2} } - 2 \times a \times \frac{1}{a} \: = 4 \\ \\ {a}^{2} + \frac{1}{ {a}^{2} } - 2 = 4 \\ \\ {a}^{2} + \frac{1}{ {a}^{2} } = 4 + 2 = 6$

hope it helps ...