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nghiemtamxyz
2 năm trước
Bài 1. Cho hai đa thức: P(x) = 2x4 + 3x3 + 3x2 - x4 - 4x + 2 - 2x2 + 6x Q(x) = x4 + 3x2 + 5x - 1 - x2 - 3x + 2 + x3 a) Thu gọn và sắp xếp các hạng tử của mỗi đa thức trên theo lũy thừa giảm dần của biến. b) Tính. P(x) + Q (x), P(x) - Q(x), Q(x) - P(x). Bài 2. Cho hai đa thức: P(x) = x5 + 5 - 8x4 + 2x3 + x + 5x4 + x2 - 4x3 Q(x) = (3x5 + x4 - 4x) - ( 4x3 - 7 + 2x4 + 3x5) a) Thu gọn và sắp xếp các hạng tử của mỗi đa thức trên theo lũy thừa giảm dần của biến. b) Tính P(x) + Q(x), P(x) - Q(x)
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