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hienlee1704
2 năm trước
Câu 1: Cho đa thức A = 3$x^2$y+2,5x$y^2$+4$x^2$y-3,5x$y^2$ a) Thu gọn A. b) Tìm bậc của A c) Tính giá trị của A tại: x =$\frac{-1}{7}$ , y=14
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