Question

Please solve
Q7
I Will Mark as brainliest​

Answer 1

Answer:

x² +(1/x²) = 34

x^4 + 1/x^4  = 1154

Step-by-step explanation:

x = 3+ √8

x = (3+√8)(3-√8) / (3-√8)

x = (9 -8) / (3-√8)

x = 1/ (3 -√8)

Or we can write 1/x = (3-√8)

Put the value and find out

x² +(1/x²) = x² + (1/x)²

So x² + 1/ x² = (3 +√8)² + (3 -√8)²

= 9+6√8+8 + 9–6√8+8

= 34.

x = 3 +√8, 1/x = 3- √8  

x^4 + 1/x^4

= (x² + 1/x²)²- 2

= ( 34 )² - 2

= 34² - 2

= 1156 -2

= 1154

Answer 2

Step-by-step explanation:

First pic is ur 1 ans and second pic is 2 ans