Question

Resolva as seguintes equações na variável x, sendo U = R: a) x 2 - x 3 = 5 c) x 6 + x 4 = -5 e) x+1 3 - x −3 5 = 2 b) x 5 + x 4 = 3 d) x+1 3 + x+2 4 = 2 f) 2x+3 2 - 2x −5 3 = 3

Answer 1

Resposta:

a) x 2 - x 3 = 5

  2x - 3x = 5

  -x = 5 . (-1)

   x = -5

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b) x 5 + x 4 = 3

  5x + 4x = 3

  9x = 3

  x = 3/9

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c) x 6 + x 4 = -5

  6x + 4x = - 5

  10x = -5

   x = -5/10

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d) x + 13 + x + 24 = 2

  x + x = 2 - 13 - 24

  2x = - 11 - 24

 2x = -35

x = -25/2

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e) x + 13 - x - 35 = 2

  x - x = 2 - 13 + 35

  x = -11 + 35

  x = 24

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f) 2x + 32 - 2x - 53 = 3

  2x - 2x = 3 - 32 + 53

  x = -29 + 53

  x = 24