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Calculate the value
Answer
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$\sqrt{ x - 1 } \sqrt{ x + 1 }$
Simplify the expression
$\sqrt{ \color{#FF6800}{ x } \color{#FF6800}{ + } \color{#FF6800}{ 1 } } \sqrt{ \color{#FF6800}{ x } \color{#FF6800}{ - } \color{#FF6800}{ 1 } }$
$ $ Reorganize the terms by applying the law of exchange $ $
$\sqrt{ \color{#FF6800}{ x } \color{#FF6800}{ - } \color{#FF6800}{ 1 } } \sqrt{ \color{#FF6800}{ x } \color{#FF6800}{ + } \color{#FF6800}{ 1 } }$
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