Question

(x+1) (x-1) = 3
find x

Answer 1

Answer:

(x+1)(x-1) = 3

x²-1 = 3

x² = 3+1

x² = 4

x = √4

x = 2

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Answer 2

Answer:

$x = 2 \: or \: - 2$

Step-by-step explanation:

${x}^{2} - 1 = 3 \\ {x }^{2} = 4 \\ x = \sqrt{4} \: \: \: or \: \: - \sqrt{4} \\ x = 2 \: \: or \:- 2$