Question

factor x2-1. Would that be (x+1)(x-1)

Answer 1

x^2-1 does factor to (x+1)(x-1)

Answer 2

Indeed, that's the third formula of Binomi

Answer 3

you can use the carrot symbol (^) to notate an exponent

Answer 4

And you can use \ ( and \ ) to mark formulas.