jimbo14
jimbo14 jimbo14
  • 04-05-2017
  • Mathematics
contestada

Solve the equation. 8x2 – 4 = 28



4, –4

2, –2

16, –16

8, –8

Respuesta :

Detector
Detector Detector
  • 04-05-2017
Hello,

Your answer would be 2, -2.

[tex]8x^2 - 4 = 28[/tex]

[tex]8x^2-4+4=28+4[/tex]

[tex]8x^2 = 32[/tex]

[tex] \frac{8x^2}{8}= \frac{32}{8} [/tex]

[tex]x^2 = 4[/tex]

x = +/4 

x = 2 or x = -2

2 , -2 would be the answer! :)


Mark Brainliest if this helped you :)
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Аноним Аноним
  • 09-05-2017
its 2,-2............
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