Question

Tìm x , biết :

x² + 12x + 2x + 24 = 0

Các bạn giải cho mình nha. Mình đag cần gấp.

Answer 1

\(x^2+12x+2x+24=0\)

\(\Leftrightarrow\left(x^2+2x\right)+\left(12x+24\right)=0\)

\(\Leftrightarrow x\left(x+2\right)+12\left(x+2\right)=0\)

\(\Leftrightarrow\left(x+12\right)\left(x+2\right)=0\)

\(\Leftrightarrow\left[{}\begin{matrix}x+12=0\\x+2=0\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=-12\\x=-2\end{matrix}\right.\)

Answer 2

\(x^2+12x+2x+24\)

\(\Leftrightarrow x\left(x+12\right)+2\left(x+12\right)=0\)

\(\Leftrightarrow\left[{}\begin{matrix}x=-2\\x=-12\end{matrix}\right.\)

Vậy ,...