Resposta :
( x^3 + 2x^2 + x + 5 ) – ( - 5x^2 + 3 ) + ( - 2x^3 - 3x ) =
x^3 - 2x^3 + 2x^2 + 5x^2 + x - 3x + 5 - 3 =
RESPOSTA -> -x^3 + 7x^2 - 2x + 2
( x^3 + 2x^2 + x + 5 ) – ( - 5x^2 + 3 ) + ( - 2x^3 - 3x ) =
x^3 - 2x^3 + 2x^2 + 5x^2 + x - 3x + 5 - 3 =
RESPOSTA -> -x^3 + 7x^2 - 2x + 2