x2 - 6x - 4x + 24 = 0
( x2 - 6x ) - ( 4x - 24 ) = 0
x( x - 6 ) - 4 ( x - 6 ) = 0
( x - 4 ) ( x - 6 ) = 0
\(\Rightarrow\orbr{\begin{cases}x-4=0\Rightarrow x=4\\x-6=0\Rightarrow x=6\end{cases}}\)
Vay x= 4 hoac x = 6
x2 - 6x - 4x + 24 = 0
( x2 - 6x ) - ( 4x - 24 ) = 0
x ( x - 6 ) - 4 ( x - 6 ) = 0
( x - 4 ) ( x - 6 ) = 0
\(\Rightarrow\orbr{\begin{cases}x-4=0\\x-6=0\end{cases}}\)
1. x - 4 = 0 => x = 4
2. x - 6 = 0 => x = 6