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ltnbmy06
2 năm trước
Cho đa thức A = 3x^2y + 2,5xy^2 + 4x^2y - 3,5xy^2. a) Thu gọn A. b) Tìm bậc của A. c) Tính giá trị của A tại: x = - 17,y = 14
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