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Nguyễn Thị Ngọc Huyền
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2023-05-05 19:09:30
b, B(x) = -2x^3 . (x^3y -2x^2y^2 + 5xy^3
= -2xy^2 . x^3y + (-2xy^2 ) .2x^2y^2 + (-2xy^2) . 5xy^3
= -2x^4y^3 + (-4x^3y^4) +(-10x^2y^5)
@Huyền
2023-05-04 21:04:00
a, N(x) =3x^4 - 2x + 2x^3
+
P(x) = 5x - 6x^3 -8
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N(x) + P(x) = 3x^4 + 3x - 4x^3 - 8
@Huyền