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Toán Lớp 8: Chứng minh rằng: $(x+y+z)^{3}$= $x^{3}$+ $y^{3}$+ $z^{3}$+$3(x+y)$$(y+z)(z+x)$

Home/ Toán Lớp 8: Chứng minh rằng: $(x+y+z)^{3}$= $x^{3}$+ $y^{3}$+ $z^{3}$+$3(x+y)$$(y+z)(z+x)$

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