If x-1/x=9 then find the value of x^2-1/x^2
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Answered by
5
Hi Mate!!!
x² - 1 / x² = ( x - 1 / x ) ( x + 1 / x)
x + 1 / x = √ {( x - 1 / x ) ² + 4}
=>
x² - 1 / x² =
9 √{ ( 9² ) + 4 }
x² - 1 / x² = 9 √85
Have a nice day ahead..
x² - 1 / x² = ( x - 1 / x ) ( x + 1 / x)
x + 1 / x = √ {( x - 1 / x ) ² + 4}
=>
x² - 1 / x² =
9 √{ ( 9² ) + 4 }
x² - 1 / x² = 9 √85
Have a nice day ahead..
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Answered by
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Hi Mate!!!
x² - 1 / x² = ( x - 1 / x )² + 4
=>
x² - 1 / x² = 9² + 4
x² - 1 / x² = 81 + 4
x² - 1 / x² = 85
Have a nice day ahead..
x² - 1 / x² = ( x - 1 / x )² + 4
=>
x² - 1 / x² = 9² + 4
x² - 1 / x² = 81 + 4
x² - 1 / x² = 85
Have a nice day ahead..
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