Question

if x=root 8, then find the value of (x²+1/x²)​

Answer 1

Answer:

65/8=8.125

Step-by-step explanation:

X=√8

so X^2=8

so expression becomes

8+1/8

taking lcm it becomes

64/8+1/8

65/8=8.125

Answer 2

Answer:

65/8

Step-by-step explanation:

$x = \sqrt{8} \\ {x}^{2} = 8 \\ {x}^{2} + \frac{1}{ {x}^{2} } = 8 + \frac{1}{8} = \frac{64 + 1}{8} = \frac{65}{8}$