smcarvalho78 smcarvalho78
  • 13-10-2020
  • Mathematics
contestada

simplify the expression 14x^-2 for x is 7

Respuesta :

sqdancefan
sqdancefan sqdancefan
  • 14-10-2020

9514 1404 393

Answer:

  2/7

Step-by-step explanation:

Put the number where x is and do the arithmetic.

  [tex]14x^{-2}=\dfrac{14}{x^2}=\dfrac{14}{7^2}=\dfrac{7\cdot2}{7\cdot7}=\boxed{\dfrac{2}{7}}[/tex]

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