Question

If ' x - 1/x = 4, then x² + 1/x² =​

Answer 1

82/9

Explanation:

x - 1/x = 4

x - 1 = 4x

-1 = 3x

- 1/3 = x

from there just substitute in x for x² + 1/x² to get:

82/9 or 9.1 recurring