Respuesta :

Answer:

b = 5 ± √5 / 5

Step-by-step explanation:

Given :

  • 5b² + 4 = 10b

Subtract 10b from both sides :

  • 5b² - 10b + 4 = 10b - 10b
  • 5b² - 10b + 4 = 0

Splitting the middle term :

  • b = 10 ± √100 - 4(5)(4) / 10
  • b = 10 ± √20 / 10
  • b = 10 ± 2√5 / 10
  • b = 5 ± √5 / 5

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