Question

[x+15] ao quadrado. alguem pfv com o calculo

Answer 1

$(x+15)^2 = x^2+2x.15+15^2 = x^2+30x +225$

Answer 2

$(x + 15)^2 \\ \\ (x + 15) (x + 15) \\ \\ x^2 + 15x + 15x + 225 \\ \\ =\ \textgreater \ x^2 + 30x + 255$