Respostas

2013-11-17T21:46:37-02:00
A) x(2x-1)+6=4(x+1)
2x²-x+6=4x+4
2x²-x+6-4x-4=0
2x²-5x+6=0

(Aplica bhaskara)

b)
(x-1)(x-2)=6
x²-2x-x+2=6
x²-3x+2-6=0
x²-3x-4=0

(Aplica bhaskara)