elizabethRODASS
elizabethRODASS elizabethRODASS
  • 03-03-2015
  • Mathematics
contestada

(20-r)^1/2=r what is the square root of this equation

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jklash12 jklash12
  • 03-03-2015
20-r=r^2
r^2+r-20=0
(r+5)(r-4)=0
r=4,-5
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