Kathy521 Kathy521
  • 02-10-2017
  • Mathematics
contestada

How do I solve for r in the following equation?
r+3/r=-4

Respuesta :

Newtion Newtion
  • 02-10-2017
I don't understand exactly what you mean, so there are two options

1.
[tex]\displaystyle \frac{r+3}{r} =-4\\\\r+3=-4r\\\\3=-5r\\\\r=- \frac{3}{5} [/tex]

2.
[tex]\displaystyle r+\frac{3}{r} =-4\\\\r^2 +3=-4r\\\\r^2+4r+3=0\\\\r_{1,2}= \frac{-4\pm \sqrt{16-12} }{2}= \frac{-4\pm 2}{2} =(-3), (-1)[/tex]
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