Nhân đa thức sau: \(\large\left( {\dfrac{1}{2}x + 3} \right)(x - 2)\)

Nhân đa thức sau: \(\large\left( {\dfrac{1}{2}x + 3} \right)(x - 2)\)

• A.  \(\large 2{x^2} + x + 6\)
• B. \(\large\dfrac{1}{2}{x^2} - 2x - 6\)
• C. \(\large\dfrac{1}{2}{x^2} + 2x - 6\)
• D. \(\large\dfrac{1}{2}{x^2} + x - 6\)

\(\large \begin{align*} &\,\left( {\large\dfrac{1}{2}x + 3} \right)(x - 2)\\&= \large\dfrac{1}{2}{x^2} - \large\dfrac{1}{2}x.2 + 3x - 6\\&= \large\dfrac{1}{2}{x^2} + 2x - 6 \end{align*}\)