Question 11094
From your description:

 {{{x^2 - 1 = 0}}} Add 1 to both sides.

{{{x^2 = 1}}} Take the square root of both sides.

{{{x = 1}}} or {{{x = -1}}}

P.S. Exponents can be entered thus: x^2 That's x followed by the caret (^) then the exponent.