(b-1)(b+5)=?
Expand the following: (b - 1) (b + 5)
(b - 1) (b + 5) = (b) (b) + (b) (5) + (-1) (b) + (-1) (5): b b + 5 b - b - 5
b b = b^2: b^2 + 5 b - b - 5
5 b - b = 4 b: b^2 + 4b - 5
