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Can someone please help me?? I have a huge test coming up and I need to review for it. Do you know the answer? If you do, please explain it because i want to be sure the day of the test. Thanks!! 25 Points!!

Can someone please help me I have a huge test coming up and I need to review for it Do you know the answer If you do please explain it because i want to be sure class=

Respuesta :

mhanifa

Answer:

Easy way is completing a square:

  • x² + 20x - 39 = 10
  • x² + 2*x*10 + 100 = 49 + 100
  • (x + 10)² = 149
  • x + 10 = ± √149
  • x = - 10 ± √149

Correct choice is J