Toán Lớp 6: (x -1)^2 = (x+3)^2
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Toán Lớp 6: (x -1)^2 = (x+3)^2
Giải giúp mình gấp ạ
Comments ( 1 )
{(x – 1)^2} = {(x + 3)^2}\\
\to \sqrt {{{(x – 1)}^2}} = \sqrt {{{(x + 3)}^2}} \\
\to \left| {x – 1} \right| = \left| {x + 3} \right|\\
\to \left[ \begin{array}{l}
x – 1 = x + 3\\
x – 1 = – x – 3
\end{array} \right.\\
\to \left[ \begin{array}{l}
– 1 = 3\left( l \right)\\
2x = – 2
\end{array} \right.\\
\to x = – 1
\end{array}\)