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Listle24
2 năm trước
a, rút gọn biểu thức : A = (x2 - 1)(x + 2) - (x - 2)(x2 + 2x + 4) b, rút gọn biểu thức : B = x2 (x+y) + y2 (x + y) +2x2y + 2xy2 c, làm tính chia : (x3 + 4x2 - x - 4) : (x + 1) d, làm tính chia : (x4 - 2x2 + 2x - 1) : (x2 - 1)
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