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6x²+3x=0
3x(2x+1)=0
3x=0 2x+1=0
x=0/3 2x= -1
x=0 x= -1
2
las dos soluciones son;
x=0 x= -1/2
.....................................
9x²-3x=0
3x(3x-1)=0
3x=0 3x-1=0
x=0/3 3x=1
x=0 x=1
3
soluciones: x=0 x=1/3