Question

if a-1/a=8 and a is not equal to 0 find i)a+1/a ii) a2-1/a2​

Answer 1

Answer:

your answer attached in the photo

Answer 2

substitute "x" as "a" in solution

$ii) \\ = > x - \frac{1}{x} = 8 \\ \\ = > {(x - \frac{1}{x}) }^{2} = 64 \\ \\ = > {x}^{2} + \frac{1}{ {x}^{2} } - 2= 64 \\ \\ = > {x}^{2} + \frac{1}{ {x}^{2} } = 66$