\(P\left(x\right)=\left(x^2+2\right)\left(x^2-2x+5\right)+\left(a+4\right)x+b-12\)
Để \(P\left(x\right)⋮Q\left(x\right)\)
\(\Leftrightarrow\left\{{}\begin{matrix}a+4=0\\b-12=0\end{matrix}\right.\)
P(x)=(x2+2)(x^2−2x+5)+(a+4)x+b−12(a+4)
Để P(x)⋮Q(x)
⇔a+4=0 hoặc b-12=0