Question

equação (x+1)(2x-1)+1=0

Answer 1

(X+1).(2x-1)+1=0
X.(2x-1)+ 1.(2X-1)=0
2x²-x +2x -1= 0
∆= 1 -4.2.-1
∆= 1+8
∆=9
X= 1+3:2= 2
X= 1-3:2= -1
S=2,-1.