(b+c)(b-c)

To simplify the expression (b+c)(b-c), we can use the distributive property.

First, let's apply the distributive property to the expression:

(b+c)(b-c) = b(b-c) + c(b-c)

Now, let's simplify each term:

b(b-c) = b^2 - bc c(b-c) = cb - c^2

Finally, let's combine the terms:

(b+c)(b-c) = b^2 - bc + cb - c^2

This is the simplified form of the expression (b+c)(b-c).