Question

Expand (p - q)(p+q).​

Answer 1

p^2 - q^2

Explanation:

This is an example of "the product and difference of two squares."

The relevant formula is (a - b)(a + b) = a^2 - b^2 (no middle term).

Here,the desired product is (p - q)(p + q) = p^2 - q^2.

Answer 2

(p - q)(p+q). :p²-q²....