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nguyenthithuy150479
2 năm trước
Câu3: kết quả phép tính 2x^2y:(-xy^2) là : A: 2x^4y^2 ; B: -2x^2y^3 ; C: 4x^3y^3 ; D: -2x^2y^2 Câu4: Cho các đơn thức sau: -2x^2y ; 2/5x^2y ; -3y^2 ; 1/2xy^2 ; 3/5x^2y Số đơn thức đồng dạng cùng đơn thức -x^2y là: A: 3 ; B: 2 ; C: 4 ;D: 5
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