Cho hai đa thức \(\begin{array}{l}P\left( x \...

Câu hỏi: Cho hai đa thức \(\begin{array}{l}
P\left( x \right) =  - 6{{\rm{x}}^5} - 4{{\rm{x}}^4} + 3{{\rm{x}}^2} - 2{\rm{x}}\\
Q\left( x \right) = 2{{\rm{x}}^5} - 4{{\rm{x}}^4} - 2{{\rm{x}}^3} + 2{{\rm{x}}^2} - x - 3
\end{array}\)

A. \( - 10{{\rm{x}}^5} - 12{{\rm{x}}^4} - 2{{\rm{x}}^3} + 8{{\rm{x}}^2} - 5{\rm{x}} + 3\)

B. \( - 10{{\rm{x}}^5} - 12{{\rm{x}}^4} - 2{{\rm{x}}^3} + 8{{\rm{x}}^2} - 5{\rm{x}} - 3\)

C. \( - 14{{\rm{x}}^5} - 12{{\rm{x}}^4} - 2{{\rm{x}}^3} + 8{{\rm{x}}^2} - 5{\rm{x}} - 3\)

D. \( - 10{{\rm{x}}^5} - 10{{\rm{x}}^4} - 2{{\rm{x}}^3} + 8{{\rm{x}}^2} - 5{\rm{x}} - 3\)