Question

if x=3+√8 find x^2+1/x^2​

Answer 1

Answer:

x=3+√8

$\frac{1}{x} = \: \ \frac{1}{3 + \sqrt{8} } \times \frac{3 - \sqrt{8} }{3 - \sqrt{8} } = 3 - \sqrt{8}$

x²+1/x² = (3+√8)² + (3+√8)²

= (17+12√2)²

Step-by-step explanation:

Hope this help you