Question

(2.x-4).(48-12.x)=0

Answer 1

\(\left(2x-4\right).\left(48-12x\right)=0\)

\(\Leftrightarrow\left[\begin{array}{nghiempt}\left(2x-4\right)=0\\\left(48-12x\right)=0\end{array}\right.\)

\(\Leftrightarrow\left[\begin{array}{nghiempt}2x=4\\12x=48\end{array}\right.\)

\(\Leftrightarrow\left[\begin{array}{nghiempt}x=2\\x=4\end{array}\right.\)

Vậy x = 2 ; 4

Answer 2

\(\left(2x-4\right)\left(48-12x\right)=0\)

\(\Leftrightarrow24\left(x-2\right)\left(4-x\right)=0\)

\(\Leftrightarrow\left[\begin{array}{nghiempt}x-2=0\\4-x=0\end{array}\right.\)\(\Leftrightarrow\left[\begin{array}{nghiempt}x=2\\x=4\end{array}\right.\)

Answer 3

câu này nữa nhé:

(x+12)².(x-1)=0

Answer 4

(2.x-4).(48-12.x)=0

=>(2.x-4)=0 hoặc (48-12.x)=0

=>2.x-4=0

=>2.x=0+4=4

=>x=4:2=2   ->(1)

48-12.x=0

=>12.x=48-0=48

=>x=48:12

=>x=4   ->(2)

Từ (1);(2)=> x có hai giá trị thỏa mãn: x=2 hoặc x=4

Answer 5

a) ( 2x - 4 ) . ( 48 - 12x ) = 0

\(\Leftrightarrow\begin{cases}2x-4=0\\48-12x=0\end{cases}\)

\(\Rightarrow\begin{cases}2x=0+4\\12x=48-0\end{cases}\)

\(\Rightarrow\begin{cases}2x=4\\12x=48\end{cases}\)

\(\Rightarrow\begin{cases}x=4:2\\x=48:12\end{cases}\)

\(\Rightarrow\begin{cases}x=2\\x=4\end{cases}\)

Vậy x = 2 hoặc x = 4

b) ( x + 12 )² . ( x - 1 ) = 0

\(\Leftrightarrow\begin{cases}\left(x+12\right)^2=0\\x-1=0\end{cases}\)

\(\Rightarrow\begin{cases}x+12=0\\x=0+1\end{cases}\)

\(\Rightarrow\begin{cases}x=0-12\\x=1\end{cases}\)

\(\Rightarrow\begin{cases}x=-12\\x=1\end{cases}\)

Vậy x = -12 hoặc x = 1