Respuesta :

Answer:

x=4

Step-by-step explanation:

to get rid of the square root on the right you square both sides so

2x+8=x^2

Then bring

2x+8

to the left so you have 0=(x^2)−2x+8

Now you can do the quadratic formula to find the zeroes

mhanifa

Answer:

  • x = {14, 4}

Step-by-step explanation:

Given equation:

  • x - 8 = √2x+8

Square both sides

  • (x - 8)² = (√2x+8)²
  • x² - 16x + 64 = 2x + 8
  • x² - 18x + 56 = 0
  • x² - 2*9x + 81 = 25
  • (x - 9)² = 5²
  • x - 9 = ± 5
  • x = 9 ± 5
  • x = 14 or x = 4

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