Question

(x+2)mũ 2 =64

Answer 1

\(\left(x+2\right)^2=64\)

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

\(\Rightarrow\left[{}\begin{matrix}x=6\\x=-10\end{matrix}\right.\)

Answer 2

Answer 3

\(\left(x+2\right)^2=64\)

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

\(\Rightarrow\left[{}\begin{matrix}x=6\\x=-10\end{matrix}\right.\)

Answer 4

\(\left[{}\begin{matrix}x+2=8\\x+2=-8\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=6\\x=-10\end{matrix}\right.\)

Answer 5

\(\left(x+2\right)^2=64\)

\(\Rightarrow\left(x+2\right)^2=\left(\pm8\right)^2\)

\(\Rightarrow\left[{}\begin{matrix}x+2=8\\x+2=-8\end{matrix}\right.\Rightarrow\left[{}\begin{matrix}x=6\\x=-10\end{matrix}\right.\)

Vậy x ∈ {6; 10}

Answer 6

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