Problem

find out the value of $x : x^{\land} 2 - 1 = 0$

Answer

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Hide Steps

Answer

$x - 1 = 0$ or $x + 1 = 0$

Steps

Step 1 ： $x^{2} - 1 = 0$

Step 2 ： $(x - 1) (x + 1) = 0$

Step 3 ： $x - 1 = 0$ or $x + 1 = 0$

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