Question

if x is equals to 3 + root 8 find the value of x raise to 2 + 1 upon X raise to 2​

Answer 1

Answer:

18+6√8

Step-by-step explanation:

x=3+$\sqrt{8}$  (given)

⇒$\frac{x^{2} +1}{x^{2} }$=?

• x²=(3+√8)²
• =9+8+6√8
• =17+6√8

⇒$\frac{x^{2} +1}{x^{2} }$=(17+6√8+1)/17+6√8

• = (18+6√8)/(17+6√8) × (17-6√8)/(17-6√8)

                                                            [Rationalizing the denominator]

• = (306+6√8-288)/(289-288)
• = (18+6√8)/1
• = 18+6√8

Hope it helps...

Mark this answer as Brainliest plz...