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(b-1)(b+5)=?

 Oct 3, 2017
 #1
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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

 Oct 3, 2017

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