sreesankarjayasankar sreesankarjayasankar
  • 25-03-2019
  • Mathematics
contestada

{x^{2} +1/x^{2} }=66 find x-1/x

Respuesta :

kashifsaleem931 kashifsaleem931
  • 25-03-2019

Answer:

Step-by-step explanation:

The solution is attached herewith.

Ver imagen kashifsaleem931
Answer Link
jimrgrant1 jimrgrant1
  • 25-03-2019

Answer:

x = ± 8

Step-by-step explanation:

Note that

(x - [tex]\frac{1}{x}[/tex])² = x² - 2 + [tex]\frac{1}{x^2}[/tex] = 66 - 2 = 64

Take the square root of both sides

x - [tex]\frac{1}{x}[/tex] = ± [tex]\sqrt{64}[/tex] = ± 8

Answer Link

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