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hoanglam1911
2 năm trước
Cho các đa thức: A = 4x2 + 3y2 -5xy; B = 3x2 +2y2 + 2x2y2. Tìm đa thức C thỏa mãn: a) C = A + B; b) C +A =B 6A. Cho các đa thức: A = x2 - 2y2 + xy + 1; B = x2 + y2 - x2y2 -1. Tìm đa thức C thỏa mãn: a) C = A + B; b) C + A =B.
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