cho H(x) = 0
\(=>\left(x-3\right)\left(x+2\right)=0\)
\(=>\left[{}\begin{matrix}x-3=0\\x+2=0\end{matrix}\right.=>\left[{}\begin{matrix}x=3\\x=-2\end{matrix}\right.\)
Đặt \(h\left(x\right)=0\)
\(\rightarrow\left(x-3\right)\left(x+2\right)=0\)
\(\rightarrow\left[{}\begin{matrix}x-3=0\\x+2=0\end{matrix}\right.\)
\(\rightarrow\left[{}\begin{matrix}x=3\\x=-2\end{matrix}\right.\)