Question

if x²+1/x²=7 then find the value of x+1x/x

Answer 1

Answer:

$\frac{ {x}^{2} + 1 }{ {x}^{2} } = 7 \\ {x}^{2} + 1 = 7 {x}^{2} \\ 7 {x}^{2} - {x}^{2} = 1 \\ 6 {x}^{2} = 1 \\ {x}^{2} = \frac{1}{6} \\ {x}^{2} = 0.16 \\ x = \sqrt{0.16} \\ x = 0.4$