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NTK1100
2 năm trước
Thu gọn rồi tìm bậc của các đơn thức, đa thức (a,b,c là các hằng số): a) [-1/2(a-1)x^3y^4z^2]^5 b)(-9/10a^3x^2y).(-5/3ax^5y^2z)^3 c)4x(x+y)-5y(x-y)-4x^2
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