Question

if x^2 + 1/x^2 = 7,
then find the value of i). x- 1/x.
ii). 2x^2 - 2/x^2.​

It's urgent

Answer 1

Answer is above mentioned.

Answer 2

Answer:

See the attachment

Step-by-step explanation:

Use the following formulae

${(a + b)}^{2} = {a}^{2} + {b}^{2} + 2ab \\ {(a - b)}^{2} = {a}^{2} + {b}^{2} - 2ab \\ {a}^{2} - {b}^{2} = (a + b)(a - b)$