Respuesta :

60010664

Answer:x

=

−

14

+

3

√

23

,

−

14

−

3

√

23

Step-by-step explanation:

MisterBrainly
  • x²+28x+11

To complete 2ab of (a+b)²

  • 2ab=28x
  • 2x(b)=28x
  • b=28x/2x
  • b=14
  • b²=196

196 must be added on both sides to get complete square as (x+14)²

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