Respostas

2013-11-09T16:44:36-02:00
A) x= -b/a x= -2/-1/2 = 2 x 2/1 = 4
y= -4/2+2
y= -2+2 y=0  coordenadas( 4,0)

b) x=-b/a = -1/3/2 = -1/3 x 2/1 = -2/3
y= 2 + 2/3/3
y= 2+ 2/3 x 3/1
y= 2 + 6/3
y=2 + 2
y=4  coodenadas ( -2/3 , 4)

Espero ter ajudado.