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10-03-2019
Mathematics

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Kamikazeminem Kamikazeminem

10-03-2019

[tex] {(x - 1)}^{2} = 9 \\ \Leftrightarrow \sqrt{ {(x - 1 )}^{2} } = \sqrt{9} \\ \Leftrightarrow |x - 1| = 3 \\ \Leftrightarrow x - 1 = \pm3 \\ \Leftrightarrow x = 4 \: \vee \: x = - 2[/tex]

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