Question

Place the indicated product in the proper location on the grid. (x + 1)(x - 1)

Answer 1

I don’t see a grid, but use FOIL:

First = x*x = x^2
Outer = x*-1 = -x
Inner = 1*x = x
Last = 1*-1 = -1

Add:
x^2 - x + x - 1
x^2 - 1