s3s3 s3s3
  • 14-07-2017
  • Mathematics
contestada

solve:

x^2 = 81

x^2 = -9

x^2 = 20

3x^2 = 125

Respuesta :

Banabanana
Banabanana Banabanana
  • 14-07-2017
x^2 = 81
x = ±√81
x = ±9

x^2 = -9 no solutions 

x^2 = 20
x = ±√20
x = ±2√5

[tex]3x^2 = 125 \\ x^2 = \frac{125}{3} \\ x=б \sqrt{ \frac{125}{3} } [/tex]
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