Question

tìm x biết :

( 5.x - 1 ) . ( 2. x -\(\dfrac{1}{3}\)) = 0

các bn ơi giúp mk vs nha mai mk nộp bài r

Answer 1

\(\left(5x-1\right)\left(2x-\dfrac{1}{3}\right)=0\)

\(\Rightarrow\left[{}\begin{matrix}5x-1=0\\2x-\dfrac{1}{3}=0\end{matrix}\right.\)

\(\Rightarrow\left[{}\begin{matrix}5x=1\\2x=\dfrac{1}{3}\end{matrix}\right.\)

\(\Rightarrow\left[{}\begin{matrix}x=\dfrac{1}{5}\\x=\dfrac{1}{6}\end{matrix}\right.\)

Vậy: ...............

Answer 2

* Trả lời:

\(\left(5x-1\right).\left(2x-\dfrac{1}{3}\right)=0\)

\(\Rightarrow5x-1=0\) hoặc \(2x-\dfrac{1}{3}=0\)

TH1: \(5x-1=0\)

\(\Rightarrow5x=1\)

\(\Rightarrow x=\dfrac{1}{5}\)

TH2: \(2x-\dfrac{1}{3}=0\)

\(\Rightarrow2x=\dfrac{1}{3}\)

\(\Rightarrow x=\dfrac{1}{6}\)

Vậy nghiệm của đa thức \(\left(5x-1\right).\left(2x-\dfrac{1}{3}\right)\) là \(x=\dfrac{1}{6};x=\dfrac{1}{5}\)