Question

d/ (-x +3).(2x+4) = 0

hộ mik vs mik cần gấp ai nhanh mik tik

Answer 1

Bổ sung đề : Tìm x

\(\left(-x+3\right)\left(2x+4\right)=0\)

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

Vậy \(x\in\left\{3;-2\right\}\)

Answer 2

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

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

Answer 3

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

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

Vậy ​​x=3 hoặc x=-2

\(\Leftrightarrow\left[{}\begin{matrix}x=3\\x=-2\end{matrix}\right.\)​