Question

if x-1/x=21/10 , find the value of x^2+1/x^2​

Answer 1

Answer:

x²+1/x² = 241/100

Explanation:

x-1/x = 21/10 [ given ]

x²+1/x² = (x-1/x)² + 2*x*(1/x)

= (21/10)² - 2

= 441/100 - 2

= (441-200)/100

= 241/100

Therefore,

x²+1/x² = 241/100

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