maeganmorales maeganmorales
  • 24-11-2017
  • Mathematics
contestada

Ryan needs to solve the equation x2−8x−9=0 by completing the square. Which pair of steps is the most efficient way to begin?

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Аноним Аноним
  • 24-11-2017
x^2 - 8x - 9 = 0
x^2 - 8x = 9
(x - 4)^2 - 16 = 9
(x - 4)^2 = 25

x - 4  = +/- sqrt25  = +/- 5

x = 5 + 4, -5 + 4 

Solution set is {-1, 9}
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daDERPfood
daDERPfood daDERPfood
  • 30-07-2020

Answer:

^2−8=9

^2−8+16=9+16

(top right)

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