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  • 08-08-2019
  • Mathematics
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completing the square
4y2+8y=11

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Аноним Аноним
  • 08-08-2019

4y2+8y=11

(2y+2)^2 -4 = 11

(2y+2)^2 = 15

(2y+2) = +-√15

y= √15 /2 - 1 , -√15/2 -1

y= (√15-2)/2, (-√15-2)/2

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