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3x 3= +18x
3x 6=+9x
27x
(3x+3)(3x+6)=0
3x+3=0
3x=3
x=1
3x+6=0
3x=6
x=2
2x(al cuadrado)+10x+12=0
2x + 6=6x
x +2=4x
10x
2x+6=0
2x=6
x=3
x+2=0
x=2
creo que hay un error