Question

(X+1).(x+1)+(x+1).(x-1)+(-x+1)?

Answer 1

Resposta:

Explicação passo-a-passo:

(x+1).(x+1)=x²+2x+1

(x+1).(x-1)=x²-1

(X+1).(x+1)+(x+1).(x-1)+(-x+1)=x²+2x+1+x²-1-x+1

Agrupando os semelhantes

(X+1).(x+1)+(x+1).(x-1)+(-x+1)=x²+x²+2x-x+1-1+1

(X+1).(x+1)+(x+1).(x-1)+(-x+1)=2x²+x+1