Question

Quanto é: (x-1)^2+(×+1)^2+4.(×+1).(×-1)?
(Resposta com cálculo pfvr)

Answer 1

(x-1)^2+(×+1)^2+4.(×+1).(×-1)

(x-1).(x-1)+(x+1).(x+1)+4.(x^2-x+x-1)
x^2-x-x+1+x^2+x+x+1+4x^2-4x+4x-4
x^2+x^2+4x^2-2
6x^2-2