Respostas

2013-06-13T21:56:34-03:00

2x²-2x-12=0 ÷2   simplificando por 2

x²-x-6=0

Δ= (-1)² -4.1.-6

Δ=1+24=25

x= - (-1)+-√25/2.1

x=1+-5/2

 

x1=1+5/2
x1=6/2
x1=3

x2= 1-5/2

x2=-4/2

x2=-2 

 

S{3,-2}

2 2 2