Toán Lớp 8: Lập p một hiệu: (1/27x ³ - 1 + x - 1/3x ²)

1/(27)x^3-1+x-1/3x^2 =(1/3x)^3-3.1/9x^2 .1+3.1/3x.1-1^3 =(1/3x-1)^3

qquad 1/27x^3-1+x-1/3x^2 =1/27x^3-1/3x^2+x-1 =(1/3x)^3-3.(1/3x)^2. 1+3. 1/3x.1-1^3 =(1/3x-1)^3

Toán Lớp 8: Lập p một hiệu: (1/27x ³ - 1 + x

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