chronic110 chronic110
  • 23-09-2020
  • Mathematics
contestada

The solutions to (x + 4) ^2- 2 = 7 are​

Respuesta :

darrenurkes darrenurkes
  • 24-09-2020

Answer:

x = -1, -7

Step-by-step explanation:

[tex](x+4)^2[/tex] -2 = 7

[tex](x+4)^2[/tex] -9 = 0 (Taking 7 to the other side)

[tex](x+4)^2[/tex] - [tex]3^2[/tex] = 0

Now use the difference of two squares rule

[((x+4)+3).((x+4)-3)] = 0

[(x+7).(x+1)] = 0

Now solve for x

x = -1, -7

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