Question

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

Answer 1

`(2x+3).(x-5)=0`

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

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

`=>` \(\left[{}\begin{matrix}2x=-3\\x=5\end{matrix}\right.\)

`=>` \(\left[{}\begin{matrix}x=-\dfrac{3}{2}\\x=5\end{matrix}\right.\)

Answer 2

\(\left(2x+3\right)\left(x-5\right)=0\)

\(\left(2x+3\right)=0\) hoặc \(\left(x-5\right)=0\)

\(2x=0-3\) hoặc \(x=0+5\)

\(x=-3\) hoặc \(x=5\)

\(x=-3:2\) hoặc \(x=5\)

\(x=-\dfrac{3}{2}\) hoặc \(x=5\)

Vậy \(=-\dfrac{3}{2}\) hoặc \(x=5\)