Question

(x-1/2).(1+5x)=0

Answer 1

<=> x - 1/2 = 0 hoặc 1 + 5x = 0 <=> x = 1/2 hoặc 5x = -1 <=> x = 1/2 hoặc x = -1/5

Answer 2

\(\left(x-\dfrac{1}{2}\right)\left(1+5x\right)=0\)

\(\Leftrightarrow\left[{}\begin{matrix}x-\dfrac{1}{2}=0\\1+5x=0\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=\dfrac{1}{2}\\x=-\dfrac{1}{5}\end{matrix}\right.\)

Vậy .............