Question

escreva na forma mais simples possivel (x-1).(x+1)+(x+1). (x-1)+(-x+1)

Answer 1

(x-1).(x+1)+(x+1).(x-1)+(-x+1)
2(x-1).(x+1)-(x-1)
(x-1).(2(x+1)-1)
(x-1).(2x+2-1)

(x-1).(2x+1)=2x²-x-1