Respuesta :

aniilsah555

Step-by-step explanation:

  • 2x-1=13
  • 2x=13+1
  • 2x=14
  • x=14/2
  • x=7

Now,

By substituting the value of x

  • -x²-4x
  • (-7)²-(4×7)
  • 49-28
  • 21

Answer:

Step-by-step explanation:

2x - 1 = 13

2x = 13 + 1

x = 14/2

x = 7

-7^2 - 4*7

-49 - 28 =. - 77

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