Question

(3x-2)(4x+5)=0

Answer 1

\(\left(3x-2\right)\left(4x+5\right)=0\Leftrightarrow\left[{}\begin{matrix}3x-2=0\\4x+5=0\end{matrix}\right.\) \(\Leftrightarrow\left[{}\begin{matrix}x=\dfrac{2}{3}\\x=-\dfrac{5}{4}\end{matrix}\right.\)

vậy \(x=\dfrac{2}{3}\) hoặc \(x=-\dfrac{5}{4}\)

Answer 2

(3x-2)(4x+5)=0

\(\left[{}\begin{matrix}3x-2=0\\4x+5=0\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=\dfrac{2}{3}\\x=-\dfrac{4}{5}\end{matrix}\right.\)

Chúc bạn học tốt nhé

Answer 3

(3x-2)(4x+5)=0

\(\left[{}\begin{matrix}3x-2=0\\4x+5=0\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=\dfrac{2}{3}\\x=-\dfrac{5}{4}\end{matrix}\right.\)

Cái kia sai nha

Lộn :)

Answer 4

\(\left(3x-2\right) \left(4x+5\right)=0\\ \Rightarrow\left[{}\begin{matrix}3x-2=0\\4x+5=0\end{matrix}\right.\\ \Leftrightarrow\left[{}\begin{matrix}x=\dfrac{2}{3}\\x=\dfrac{-5}{4}\end{matrix}\right.\)