Question

phân tích đa thức thành nhân tử: x^2 - 6x - 4x + 24 = 0

Answer 1

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

Answer 2

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