Question

(-10x+5)(2x-8)=0

Answer 1

\(\left(-10x+5\right)\left(2x-8\right)=0\)

\(\Leftrightarrow\left[{}\begin{matrix}-10x+5=0\\2x-8=0\end{matrix}\right.\)

\(\Leftrightarrow\left[{}\begin{matrix}-10x=-5\\2x=8\end{matrix}\right.\)

\(\Leftrightarrow\left[{}\begin{matrix}x=\dfrac{1}{2}\\x=4\end{matrix}\right.\)

\(S=\left\{\dfrac{1}{2},4\right\}\)

Answer 2

\(\left(-10x+5\right)\left(2x-8\right)=0\)

\(\Leftrightarrow\left[{}\begin{matrix}-10x+5=0\\2x-8=0\end{matrix}\right.\)

\(\Leftrightarrow\left[{}\begin{matrix}x=\dfrac{1}{2}\\x=4\end{matrix}\right.\)

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