Question

Tìm X:

( X - 1 ) . ( X - 2 ) = 0

Answer 1

\(\left(x-1\right)\left(x-2\right)=0\)

\(\Rightarrow\left[{}\begin{matrix}x-1=0\\x-2=0\end{matrix}\right.\)

\(\Rightarrow\left[{}\begin{matrix}x=1\\x=2\end{matrix}\right.\)

Vậy \(x\in\left\{1;2\right\}\)

Answer 2

<=> \(\left[\begin{array}{nghiempt}x-1=0\Rightarrow x=1\\x-2=0\Rightarrow x=2\end{array}\right.\)

Vậy...

Answer 3

\(\left(x-1\right).\left(x-2\right)=0\)

\(\Rightarrow\left[\begin{array}{nghiempt}x-1=0\\x-2=0\end{array}\right.\)

\(\Rightarrow\left[\begin{array}{nghiempt}x=1\\x=2\end{array}\right.\)

Answer 4

\(\left(x-1\right).\left(x-2\right)=0\)

\(\Leftrightarrow\left[{}\begin{matrix}x-1=0\\x-2=0\end{matrix}\right.\) \(\Leftrightarrow\left[{}\begin{matrix}x=0+1\\x=0+2\end{matrix}\right.\) \(\Leftrightarrow\left[{}\begin{matrix}x=1\\x=2\end{matrix}\right.\)

Vậy \(x=1\) và \(x=2\)

Answer 5

(x-1).(x-2)=0

x-1=0

x=0+1

x=1

Hoặc :x-2=0

x=0+2

x=2

Vậy x \(\in\)(1,2)

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