Question

3x²+12x=0

Giải gíp ạ

Answer 1

\(3x^2+12x=0\)

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

=>\(x^2+4x=0\)

=>\(x\left(x+4\right)=0\)

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

Answer 2

\(3x^2+12x=0\)

\(3x.\left(x-4\right)=0\)

\(3x=0\) hoặc \(x-4=0\)

\(\Rightarrow x=0\) hoặc \(x=4\)