P(x) = x⁵ - x⁴ - 7x³ + 2x³ + 3x + 2
P(x) = x⁵ - x⁴ - 5x³ + 3x + 2
Q(x) = x² . 3x⁵ - 5x - x³ - 3
Q(x) = 3$x^{7}$ - x³ - 5x - 3
P(x) = x⁵ - x⁴ - 5x³ + 3x + 2
+
Q(x) = 3$x^{7}$ - x³ - 5x - 3
______________________________________________
P(x) + Q(x) = 3$x^{7}$ + x⁵ - x⁴ - 6x³ -2x -1
P(x) = x⁵ - x⁴ - 5x³ + 3x + 2
-
Q(x) = 3$x^{7}$ - x³ - 5x - 3
__________________________________________________
P(x) + Q(x) = -3$x^{7}$ + x⁵ - x⁴ - 4x³ + 8x + 5
Chúc bạn học tốt ^^