guppy08
guppy08
15-11-2016
Mathematics
contestada
factor: 3x^2+2x-21=0
Respuesta :
SugaBear1993
SugaBear1993
18-11-2016
(3x-7)(x+3)
FOIL
3x*x=3x^2
3*3x+-7*x=2x
-7*3=-21
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