Question

How do you solve `(x-1)(x+1)=3`?

Answer 1

`x^2 + x - x - 1 = 3`

`x^2 - 1 - 3 = 0`

`x^2 - 4 = 0`

`(x + 2)(x - 2) = 0`

`x = +-2`

Hopefully this helps!