KiaraMungin KiaraMungin
  • 12-07-2015
  • Mathematics
contestada

Solve x2 = 144. 72 12 ±12 −12

Respuesta :

AL2006
AL2006 AL2006
  • 12-07-2015

If x²=144, then x= positive 12 and x= negative 12.

I have no idea what the '72' is doing in there.
If it means  x²=144.72 , then

     x = +/- 12.03 (rounded)

Oh wait.  Now I understand what the 72 is.  It's one of the answer choices.
Specifically, it's the customary absurd choice for students who have no clue.


Answer Link

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