Question

plz do faaaasssssttttttt ​

Answer 1

Answer:

$b) \: \: \: \: \: \: \: \: \: (z + \frac{1}{z} )(z + \frac{1}{z} - 2)$

Step-by-step explanation:

$( {z}^{2} + \frac{1}{ {z}^{2} } + 2 )- 2z - \frac{2}{z} = {(z + \frac{1}{z} )}^{2} - 2(z + \frac{1}{z} ) \\ \\ = (z + \frac{1}{z} )(z + \frac{1}{z} - 2)$