Bài 1:
a) \(\left(8x^4-4x^3+x^2\right):2x^2\)
\(=4x^2-2x+1\)
b) \(\left(6x^4-3x^3+x^2\right):3x^2\)
\(=2x^2-x+3\)
Bài 2:
\(2x\left(x-3\right)-\left(x-3\right)=0\)
\(\Rightarrow\left(x-3\right)\left(2x-1\right)=0\)
\(\Rightarrow\left[{}\begin{matrix}x-3=0\Rightarrow x=3\\2x-1=0\Rightarrow x=0,5\end{matrix}\right.\)