Question

If x×x +1/x×x =23 find the values of x-1/x

Answer 1

Answer :

√21

Step-by-step explanation :

x² + 1 / x² = 23

On subtracting 2 both the sides.

⇒ x² + 1 / x² - 2 = 23 - 2

⇒ x² + 1 / x² - 2 * x * 1 / x = 21

Using identity here,

( a² + b² - 2ab ) = ( a - b )²

⇒ ( x - 1 / x )² = 21

⇒ ( x - 1 / x ) = √21

Hence, the value of ( x - 1/x ) is √21.

Answer 2

if this is helpful for u then please mark as brainlist answer