Cho hai đa thức P(x) = 2x^2 - 5x - 1/3; Q(x) = -6x^4 + 5x^2 + 2/3 + 3x
Giải thích
P(x) – Q(x) = (2x2 – 5x – \(\frac{1}{3}\)) – (– 6x4 + 5x2 + 3x + \(\frac{2}{3}\))= 2x2 – 5x – \(\frac{1}{3}\) + 6x4 – 5x2 – 3x – \(\frac{2}{3}\)= 6x4 + (2 – 5)x2 + (–5 – 3)x – \(\frac{1}{3}\) – \(\frac{2}{3}\)= 6x4 – 3x2 – 8x – 1