# How do you multiply binomials (a+b)(a-b)?

$\left(a + b\right) \left(a - b\right)$
$\left({a}^{2} - a b + a b - {b}^{2}\right)$
$\left(a + b\right) \left(a - b\right) = \left({a}^{2} - {b}^{2}\right)$