\[\eqalign{ & - 3{x^3}{y^5}\,\,;\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, - 0,3{x^2}y\,\,;\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,7x{y^2}z \cr & 2{x^3}{y^5}\,\,;\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,4{x^2}y\,\,;\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, - 3x{y^2}z \cr}\]
Đề bài
Sắp xếp các đơn thức sau thành từng nhóm các đơn thức đồng dạng:
\[\eqalign{ & - 3{x^3}{y^5}\,\,;\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, - 0,3{x^2}y\,\,;\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,7x{y^2}z \cr & 2{x^3}{y^5}\,\,;\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,4{x^2}y\,\,;\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, - 3x{y^2}z \cr}\]
Lời giải chi tiết
Nhóm 1: \[ - 3{x^3}{y^5};2{x^3}{y^5}\]
Nhóm 2: \[ - 0,3{x^2}y;4{x^2}y\]
Nhóm 3: \[7x{y^2}z; - 3x{y^2}z\]