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nguyenthithu26
2 năm trước
a) Tìm các số nguyên x, y thỏa mãn: 2xy − x − y = 2. b) Tìm tất cả các cặp số nguyên x, y để tích của chúng bằng 5 lần tổng của chúng. c) Tìm x∈Z biết: (x2 −10)(x2 −3) < 0. d) Tìm giá trị nhỏ nhất của biểu thức: A=|2x+1|−2.
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