Question

\(_{\left(x-8\right)\left(x^3+8\right)=0}\)

Answer 1

ai giúp mik với

 

 

Answer 2

\(\left(x-8\right)\left(x^3+8\right)=0\)

\(\Leftrightarrow\left[{}\begin{matrix}x-8=0\\x^3+8=0\end{matrix}\right.\)

\(\Leftrightarrow\left[{}\begin{matrix}x=8\\x^3=8\end{matrix}\right.\)

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

\(S=\left\{8,2\right\}\)

Answer 3

\(\left[{}\begin{matrix}x-8=0\\x^3+8=0\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=8\\x^3=8\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=8\\x=-2\end{matrix}\right.\)

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