Question

Como resolvo isso?
(x+1)^2 + (x+2)^2 =??

Answer 1

$(x + 1)^2 + (x + 2)^2 \\ \\ \\ (x + 1)(x + 1) + (x + 2)(x + 2) \\ \\ \\ x^2 + x +x + 1 + x^2 + 2x + 2x + 4 \\ \\ \\ x^2 + 2x + 1 + x^2 + 4x + 4 \\ \\ \\ x^2 + x^2 + 2x + 4x + 1 + 4 \\ \\ \\ => 2x^2 + 6x + 5$