[tex] \frac{ \sqrt{2} - 1}{ - \sqrt{2} + 1} = \frac{ \sqrt{2} - 1 }{ - ( \sqrt{2 } - 1)} = \boxed{\boxed{\boxed{ - 1}}} \\ [/tex]
atte. yrz
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[tex] \frac{ \sqrt{2} - 1}{ - \sqrt{2} + 1} = \frac{ \sqrt{2} - 1 }{ - ( \sqrt{2 } - 1)} = \boxed{\boxed{\boxed{ - 1}}} \\ [/tex]
atte. yrz