Respostas

2014-01-11T19:31:54-02:00
(5x²-3x² +4x +5) - (2x³ +4x² -3x + 2)
5x²-3x²+4x+5-2x³-4x²+3x-2
-2x³+5x²-3x²-4x²+4x+3x+5-2
-2x³-2x²+7x+3

2014-01-11T19:49:00-02:00
(5x²-3x²+4x+5)-(2x³+4x²-3x+2)
= 5x²-3x²+4x+5-2x³-4x²+3x-2
= -2x³+5x²-3x²-4x²+4x+3x+5-2
= -2x³-2x²+7x+3