`a,4x(x-32)=0`
`⇔` \(\left[ \begin{array}{l}4x=0\\x-32=0\end{array} \right.\) `⇔` \(\left[ \begin{array}{l}x=0\\x=32\end{array} \right.\)
`b,(x-3)(x-8)=0`
`⇔` \(\left[ \begin{array}{l}x-3=0\\x-8=0\end{array} \right.\) `⇔` \(\left[ \begin{array}{l}x=3\\x=8\end{array} \right.\)
`f,(2x-2).45=0`
`⇔2x-2=0`
`⇔2(x-1)=0`
`⇔x-1=0`
`⇔x=1`
`g,32(5x-8)=32`
`⇒5x-8=1`
`⇔5x=9`
`⇔x=9/5`
`h,(x-4)(x-7)=0`
`⇔` \(\left[ \begin{array}{l}x-4=0\\x-7=0\end{array} \right.\) `⇔` \(\left[ \begin{array}{l}x=4\\x=7\end{array} \right.\)
`i,5x(3x-15)=0`
`⇔` \(\left[ \begin{array}{l}5x=0\\3x-15=0\end{array} \right.\) `⇔` \(\left[ \begin{array}{l}x=0\\x=5\end{array} \right.\)
`k,(2x-3)(x-2)=0`
`⇔` \(\left[ \begin{array}{l}2x-3=0\\x-2=0\end{array} \right.\) `⇔` \(\left[ \begin{array}{l}x=\dfrac{3}{2}\\x=2\end{array} \right.\)
