Question

1 Thực hiện phép nhân

c,(4x³-3xy²+ 2xy) [-\(\dfrac{1}{3}x^2y\) ]

b,(5xy-x²+y )\(\dfrac{2}{5}xy^2\)

Answer 1

\(a,\left(4x^3-3xy^2+2xy\right).\left(-\dfrac{1}{3}x^2y\right)\)

\(=\dfrac{-x}{3y}+\dfrac{y}{x}-\dfrac{2}{3x}\)

\(b,\left(5xy-x^2+y\right)\left(\dfrac{2}{5}xy^2\right)\)

\(=\dfrac{2}{y}-\dfrac{2x}{5y^2}+\dfrac{2}{5xy}\)

Answer 2

c,=\(\dfrac{-4}{3}x^5y+x^3y^3-\dfrac{2}{3}x^3y^2\) b,=\(2x^2y^3-\dfrac{2}{5}x^3y^2+\dfrac{2}{5}xy^3\)