Question

TÌM X BIẾT

X² - 4.X = 0

Answer 1

Ta có:

\(x^2-4x=0\)

\(\Leftrightarrow x\left(x-4\right)=0\)

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

Answer 2

cảm ơn

Answer 3

\(x^2-4x=0\)
\(\Leftrightarrow\left(x-4\right)\left(x-0\right)=0\)
\(\Leftrightarrow\left[{}\begin{matrix}x-4=0\\x-0=0\end{matrix}\right.\)\(\Leftrightarrow\left[{}\begin{matrix}x=4\\x=0\end{matrix}\right.\)
T.I.C.K mk nhé bn ^_^