Tách đi cậu ơiii
`a,2(3x-1)-3x=10`
`<=> 6x-2-3x-10=0`
`<=> 3x-12=0`
`<=>3x=12`
`<=>x=4`
`b,3(5x-2)-7x=10`
`<=> 15x-6-7x-10=0`
`<=> 8x-16=0`
`<=> 8x=16`
`<=> x=2`
`c,4(x+2)-5=2x+1`
`<=> 4x+8-5-2x-1=0`
`<=> 2x -2=0`
`<=>2x=2`
`<=>x=1`
`d,(x+2)(x-1)=0`
\(\Leftrightarrow\left[{}\begin{matrix}x+2=0\\x-1=0\end{matrix}\right.\\ \Leftrightarrow\left[{}\begin{matrix}x=-2\\x=1\end{matrix}\right.\)
`e,4x(x-3)-3x+9=0`
`<=> 4x(x-3) - 3(x-3)=0`
`<=>(x-3)(4x-3)=0`
\(\Leftrightarrow\left[{}\begin{matrix}x-3=0\\4x-3=0\end{matrix}\right.\\ \Leftrightarrow\left[{}\begin{matrix}x=3\\4x=3\end{matrix}\right.\\ \Leftrightarrow\left[{}\begin{matrix}x=3\\x=\dfrac{3}{4}\end{matrix}\right.\)
`f, x(x-4) -3x+12=0`
`<=> x(x-4)-3(x-4)=0`
`<=>(x-4)(x-3)=0`
\(\Leftrightarrow\left[{}\begin{matrix}x-4=0\\x-3=0\end{matrix}\right.\\ \Leftrightarrow\left[{}\begin{matrix}x=4\\x=3\end{matrix}\right.\)
`g, 2x(x-3) +5x-15=0`
`<=>2x(x-3) + 5(x-3)=0`
`<=>(x-3)(2x+5)=0`
\(\Leftrightarrow\left[{}\begin{matrix}x-3=0\\2x+5=0\end{matrix}\right.\\ \Leftrightarrow\left[{}\begin{matrix}x=3\\2x=-5\end{matrix}\right.\\ \Leftrightarrow\left[{}\begin{matrix}x=3\\x=-\dfrac{5}{2}\end{matrix}\right.\)
`h, (3x+2)(4x-5)=0`
\(\Leftrightarrow\left[{}\begin{matrix}3x+2=0\\4x-5=0\end{matrix}\right.\\ \Leftrightarrow\left[{}\begin{matrix}3x=-2\\4x=5\end{matrix}\right.\\ \Leftrightarrow\left[{}\begin{matrix}x=-\dfrac{2}{3}\\x=\dfrac{5}{4}\end{matrix}\right.\)
