Question

x - 1/x = 4, then x^2 - 1/x^2 =?

Answer 1

Answer:

$x - \frac{1}{x} = 4 \\ {x }^{2} - 1 = 4 \\ {x}^{2} = 5 \\ x = \sqrt{5} \\ \\ {x}^{2} - \frac{1}{ {x}^{2} } \\ 5 - \frac{1}{5} \\ = 24$

here is your answer

Step-by-step explanation:

^^^^^^^^^xd

Answer 2

Answer:

-8 + 4√10 OR -8 - 4√10

Step-by-step explanation:

please see the image