Question

x+1/8=8then find the value of x²+1/x²

Answer 1

Answer: 62.03

Step-by-step explanation:

$x+\frac{1}{8}=8\\ x= 8-\frac{1}{8}\\ x=\frac{64-1}{8}\\ x=\frac{63}{8}$

$x^{2}+\frac{1}{x^{2}}=\frac{63}{8}^{2}+\frac{8}{63} ^{2}$

                                     =$\frac{3969}{64}+\frac{64}{3969}$

                                     = $\frac{15752961+4096}{254016}=\frac{15757057}{254016}$

                                    = 62.03