elizabethRODASS elizabethRODASS

03-03-2015
Mathematics

contestada

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

Respuesta :

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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