Đáp án:
\(\begin{array}{l}
Bai\,\,1:\\
a)\,\,\,4x + 5y - 3\\
b)\,\,\,6{x^3} - 18{x^2} - 8{x^2} + 24x\\
Bai\,\,2:\,\,Sai.
\end{array}\)
Giải thích các bước giải:
\(\begin{array}{l}
Bai\,\,1:\\
a)\,\,\left( {8{x^2}y + 10x{y^2} - 6xy} \right):2xy\\
= 2xy\left( {4x + 5y - 3} \right):2xy\\
= 4x + 5y - 3.\\
b)\,\,\left( {3{x^2} - 4x} \right)\left( {2x - 6} \right) = 6{x^3} - 18{x^2} - 8{x^2} + 24x.\\
Bai\,\,\,2:\\
{x^3} + 8:\left( {{x^2} - 2x + 4} \right) = x + 2\,\,\,sai\\
Sua\,\,\,lai:\,\,\,\left( {{x^3} + 8} \right):\left( {{x^2} - 2x + 4} \right)\\
= \left( {x + 2} \right)\left( {{x^2} - 2x + 4} \right):\left( {{x^2} - 2x + 4} \right) = x + 2.
\end{array}\)
