Question

(x + 1)(x - 1) factoring trinomial

Answer 1

foil method!

Answer 2

Use the Foil method

F = Multiply First set of numbers
O = Multiply Outer set of numbers
I = Multiply Inner set of numbers
L = Multiply Last set of numbers

F = x * x =x^2
O = x * -1 = -1x
I = x *1 = 1x
L = 1 * -1 = -1

Put it together