Question

if x = 3 + root 8 find the value of x raised to 2 + 1 by x raised to 2​

Answer 1

Answer:

Given, x = 3+√8

To find :- value of (x²+¹)/x²

= x³/x² = x

Therefore,

(x²+¹)/x² = 3 +√8

Step-by-step explanation:

Hope it helps!!!

Answer 2

$x = 3 + \sqrt{8} \\ x = (3 + \sqrt{8} )(3 - \sqrt{8} ) (3 - \sqrt{8} ) \\ x = (9 - 8)(3 - \sqrt{8} ) \\ x = 1(3 - \sqrt{8} ) \\ or \: we \: can \: write \\ x = (3 - \sqrt{8} ) \\ put \: the \: value \: and \: find \: out \\ x {}^{2} + (x {}^{2} ) = x {}^{2} + (x {}^{2} ) \\ so \: \: x {}^{2} + 1x {}^{2} = (3 + \sqrt{8} ) {}^{2} + (3 - \sqrt{8} ) {}^{2} \\ = 9 + 6 \sqrt{8} + 8 + 9 - 6 \sqrt{8} - 8 \\ = 34 \: \: ans$

= 34 ANS