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Huy Toàn 8A (TL)

06/08/2018 at 01:50
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D = (-2x3 - xy2) + (xy2 - 1) - (x2y - xy2 + 3x2)

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    Sherlockkichi 06/08/2018 at 02:31

    \(D=\left(-2x^3-xy^2\right)+\left(xy^2-1\right)-\left(x^2y-xy^2+3x^2\right)\)

    \(D=-2x^3-xy^2+x^2-1-\left(x^2y-xy^2+3x^2\right)\)

    \(D=-2x^3-xy^2+xy^2-1-x^2y+xy^2-3x^2\)

    \(D=-2x^3-x^2y-3x^2+xy^2-1\)

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